Meeting minutes for a nonprofit organization:
Author = organization, name of committee
Date = date of the meeting
Title = whatever is at the top of the first page
Publication info = whatever information is necessary to retrieve the source
The last element is the most difficult, but can be modeled on the examples of archival documents in section 7.10 of the APA Publication Manual (6th ed.). It might look something like this:
Paperboard Packaging Council. (2008, July 9). Meeting of the PPC Board of Directors. Archives of the American Forest Products Association, Washington, DC.
An organization's training handbook:
This can be handled simply as a book:
Federation of American Zookeepers. (2010). How to scoop the elephant poop (and other helpful tips for beginning zookeepers). Washington, DC: Author.
An organization's constitution or terms of reference:
These would most likely be found on the organization’s website:
American Psychological Association. (2010). Ethical principles of psychologists and code of conduct. Retrieved from http://www.apa.org/ethics/code/index.aspx
The "author" of reports, websites, can be an organization or governing body (such as a government department). In these cases, the organization IS the author and should be listed as such in your final citation.