SOCY55 / PBPL 81.05 : Poverty & Public Policy in the U.S.

Buried a few layers down on APA Style site, with a bit more detail than the quick guide. See in particular the "Reference Examples" page.

The APA's flagship journal. Try browsing articles' bibliographies from recent issues for examples of how items are cited. Once you understand the basic pattern, there's a lot of flexibility for customizing citations to "irregular" materials.