The College of William and Mary. (n.d.) College mission statement. Retrieved from http://www.wm.edu/about/administration/provost/mission/index.php
Note: The date to use from a web page is sometimes difficult to determine. The APA blog entry for dating online documents cautions against using any of the following as the date--a “last modified,” or “revised on” date or copyright date that is site-wide--as none of these usually refers to when the material was actually created or posted. If no obvious posted date is available at the beginning or the end of a document, use “n.d.” for “no date” instead (as in the preceding example)
Rightsholder, A. A. (year). Title of software or program (Version number) [Description of form]. Retrieved from http://xxxx
Note: “Rightsholder, A. A.” stands for either an individual author or a corporate author of the software.
Skyscape. (2010). Skyscape medical resources (Version 1.9.11) [Mobile application software]. Retrieved from http://itunes.apple.com/