How To Write A Citation In A Research Paper . As with mla citations, include a doi if you found the research paper online. Only use a comma to separate the publication year and the page. Term Paper Format Sample Free Home APA Citation Style LibGuides from chewtheworld.com As with mla citations, include a doi if you found the research paper online. Here is an example of a published research paper cited in apa format: In this case, you should search for the original source.