Documenting Your Sources
APA style calls for a list of sources at the end of the essay on a separate page headed "References," in alphabetical order by author and using hanging indents. If you used the NIH publication “Brain Basics: Understanding Sleep,” for instance, you’d begin the entry with the organization that authored the piece, a component of the NIH, because no individual writer is credited:
National Institute of Neurological Disorders and Stroke. (2014). Brain Basics, Understanding Sleep. Retrieved from http://www.ninds.nih.gov/disorders/brain_basics/understanding_sleep.htm
The first time you refer to the source in your text, cite the author and date in parentheses: (National Institute of Neurological Disorders and Stroke, 2014).
For subsequent references, you can use the organization’s abbreviation instead: (NINDS, 2014).