American Psychological Association. (1996). Psychological methods. American Psychological Association.
Lua i Stíl Chicago (17ú heag.)American Psychological Association. Psychological Methods. Washington, DC: American Psychological Association, 1996.
Lua MLA (9ú heag.)American Psychological Association. Psychological Methods. American Psychological Association, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.