Answered By: Michael Pujals
Last Updated: Sep 28, 2018     Views: 68

In APA I think this would be a Authored report, from nongovernmental organization (#33 in section 7.03 of the APA manual).

The format would be:

Author. (Year). Report title. Retrieved from NGO website name: URL

In this particular case:

Westphal, C., Wavra, T. (2005). Acute and critical care choices guide to advance directives. Retrieved from the American Association of Critical Care Nurses website: document URL goes here.