Research papers rely heavily on information and data obtained from outside sources to support and develop their theses and arguments. As such, properly citing sources is an essential component of any research paper. While specific citation styles, such as APA, MLA, Chicago, etc., have their own distinct formatting guidelines for how exactly to cite different source types, all academic citation styles share the common goal of giving appropriate credit to source authors and allowing readers to locate cited materials. This article will discuss the general purpose and importance of citations, summarize the key citation elements across styles, and provide examples of citations formatted according to MLA and APA style guidelines.
The primary purpose of citations is to allow readers to locate and verify claims made using outside sources. When an author utilizes facts, statistics, opinions, theories, models, or other information obtained from another source, that source must be properly credited through an in-text citation and full source listing. This serves several key functions. First, it gives appropriate intellectual credit to the original source authors and recognizes that the claims being made did not originate with the current paper’s author. Second, it allows readers to check the source material themselves if they want to learn more about a topic or argument being discussed. Third, it establishes the author’s credibility by demonstrating well-researched content supported by authoritative sources instead of just unsupported personal claims or opinions. Finally, proper citation of sources helps prevent plagiarism, as it clearly distinguishes what information originated with the source rather than the citing author. While paraphrased or summarized content does not need to be in quotation marks, verbatim or nearly verbatim content requires verbatim quotation with clear citations connecting it back to its source.
Although citation styles have variations in format details, all academic citations share common core components that should be included to properly credit sources. Typically, citations contain the following key elements:
Author(s) Name: The name of the person or organization responsible for the source content. For citations with one author, list the last name first followed by a comma and then the first name. For citations with multiple authors, list the last name of the first author followed by “and” and the last name of the second author.
Year of Publication: The year the source content was published. This element helps identify which version of a source an author cited when multiple versions exist.
Source Title: The full title of the book, journal article, report, website etc. being cited should be included. Titles of smaller works like articles or chapters are enclosed in “quotation marks” while titles of larger works like books or reports are italicized or underlined.
Publication Information: Additional details needed to properly identify and locate the source like the publisher, volume/issue number, website URL, database name, date accessed etc. Depending on the citation style, some elements may appear in parenthetical notes while others are placed in a reference list.
Location Identifier: Page numbers for print sources. URL, DOI, or database accession number for electronic sources. This element helps readers quickly locate the specific information cited within the full source text.
The following examples demonstrate citations formatted according to MLA style and APA style guidelines, with key elements highlighted:
MLA In-Text Citation:
As noted by Smith and Jones, “renewable energy production saw unprecedented growth in 2019” (27).
MLA Works Cited Entry:
Smith, John, and Susan Jones. “A Review of Global Renewable Energy Markets in 2019.” Journal of Clean Energy, vol. 12, no. 1, 2020, pp. 25-30.
APA In-Text Citation:
Renewable energy production saw unprecedented growth in 2019 (Smith & Jones, 2020).
APA Reference List Entry:
Smith, J., & Jones, S. (2020). A review of global renewable energy markets in 2019. Journal of Clean Energy, 12(1), 25-30. https://doi.org/10.7547/jce.2020.12.1.25
As demonstrated in these examples, even though specific citation formats differ, the core components of author name(s), publication year, source title, and location data are consistently included to properly credit outside sources. Careful citation of research paper sources used is essential for ethical academic writing and allows readers to verify claims made using outside evidence. Mastering source citation skills helps establish credibility and avoid plagiarism challenges.