APA Style® originated in 1929, when a group of psychologists, anthropologists, and business managers convened and sought to establish a simple set of procedures, or style rules, that would codify the many components of scientific writing to increase the ease of reading comprehension.
As with other editorial styles, APA Style consists of rules or guidelines that a publisher observes to ensure clear and consistent presentation of written material. It concerns uniform use of such elements as:
Author, A. A., Author B. B., & Author, C. C. (Year). Title of article. Title of Journal, Volume(Issue), pages–pages. https://doi.org/XXXXXXXXXXX
Reed, M. J., Kennett, D. J., Lewis, T., Lund-Lucas, E., Stallberg, C., & Newbold, I. L. (2009). The relative effects of university success courses and individualized interventions for students with learning disabilities. Higher Education Research & Development, 28(4), 385–400. https://doi.org/10.1080/07294360903067013
Newspaper Articles (online)
Author, A. A. (Year, Month Day). Title of article. Newspaper Title, pages–pages.
Associated Press. (2019, October 7). Unions sue USDA seeking to halt new pork processing rule. The New York Times. https://www.nytimes.com/aponline/2019/10/07/us/ap-us-pork-slaughter-changes.html
Magazine Articles (online)
Author, A. A. (Year, Month Day). Title of article. Title of Magazine, Volume(Issue). http://xxxxx
The supermarket of the future. (2017, May 23). Consumer Reports. https://www.consumerreports.org/grocery-stores-supermarkets/supermarket-of-the-future/
Books & eBooks
Author, A. A. (Year). Title of book. Publisher. https://doi.org/XXXXXX
George, M. W. (2008). The elements of library research: What every student needs to know. Princeton University Press.
Chapter in an Edited Book
Author of Chapter, A. A. & Author, B. B. (Year). Title of chapter or entry. In A. Editor, B. Editor, & C. Editor (Eds.), Title of book (pp. xxx–xxx). Publisher.
Shephered, S. (1988). Shakespeare's private writings: Shakespeare and secrets. In G. Holderness (Ed.), The Shakespeare myth (pp. 96–110). Manchester University Press.
Films (DVD / Streaming)
Director, A. A. (Director). (Year). Title of video [Film]. Production Company.
Bier, S. (Director). (2018). Bird box [Film]. Netflix; Chris Morgan Productions; Dylan Clark Productions.
Images
Author (Year). Title of image [Photograph]. Website. http://xxxxx
Science in HD. (n.d.). Living large [Photograph]. Unsplash. https://unsplash.com/photos/te465W47_b8
Online Videos (e.g. YouTube)
Author, A. A. [username]. (Year, Month Day). Title of video [Video]. Website. http://xxxxx
Vercamath. (2011, July 25). Parallel universes explained [Video]. YouTube. http://www.youtube.com/watch?v=GWaB3SksOQU
Podcasts
Host, A. A. (Host). (Year, Month Day). Episode title (No. XX) [Audio podcast episode]. In Title of podcast. Production Company. http://xxxxx
Mars, R. (Host). (2019, September 30). The help-yourself city (No. 375) [Audio podcast episode]. In 99% invisible. Radiotopia. https://99percentinvisible.org/episode/the-help-yourself-city/
Webpages / Web Documents
Author, A. A. (Year). Title of page. Website. http://xxxxx
U.S. Department of Veterans Affairs. (2010). Facing down PTSD, vet is now soaring high.
http://www.mentalhealth.va.gov/featureArticle_Feb.asp
More examples may be found here: https://apastyle.apa.org/style-grammar-guidelines/references/examples