When making a passing reference to an entire website, it is sufficient to give the address of the site in just the text of the paper.
Example: Kidspsych is a wonderful interactive website for children (http://www.kidspsych.org).
General Website Article/Document with an Author
Simmons, B. (2015, January 9). The tale of two Flaccos. Retrieved from http://grantland.com/the-triangle/the-tale-of-two-flaccos/
General Website Article/Document without an Author
Teen posed as doctor at West Palm Beach hospital: Police. (2015, January 16). Retrieved from http://www.nbcmiami.com/news/local/Teen-Posed-as-Doctor-at-West-Palm-Beach-Hospital-Police-288810831.html
PZ Myers. (2007, January 22). The unfortunate prerequisites and consequences of partitioning your mind [Web log post]. Retrieved from http://scienceblogs.com/pharyngula/2007/01/the_unfortunate_prerequisites.php
MiddleKid. (2007, January 22). Re: The unfortunate prerequisites and consequences of partitioning your mind [Web log comment]. Retrieved from http://scienceblogs.com/pharyngula/2007/01/the_unfortunate_prerequisites.php
Message Posted to an Online Forum or Discussion Board
Rampersad, T. (2005, June 8). Re: Traditional knowledge and traditional cultural expressions [Online forum comment]. Retrieved from http://www.wipo.int/roller/comments/ipisforum/Weblog/theme_eight_how_can_cultural#comments
Online videos can be either video blog posts or standalone videos, both of which require slightly different reference formats. If the video is a standalone video posted to YouTube or a similar video sharing service, then put the title of the video in italics. If the video is an entry in a larger video blog, then do not italicize the title. See examples below.
The apastyle.org website recommends that the screen name (username) of the person who posted the video be included in brackets after the author section. If only the screen name of the person who posted the video is known, then make that the author field (without brackets).
Video Part of Larger Video Blog
PBSoffbook. (2013, October 3). How to be creative [Video file]. Retrieved from https://www.youtube.com/watch?v=weIQIthC3Ks
Standalone Video Posted to YouTube
Apsolon, M. [markapsolon]. (2011, September 9). Real ghost girl caught on Video Tape 14 [Video file]. Retrieved from http://www.youtube.com/watch?v=6nyGCbxD848