MM. (1994). Psychology. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)MM. Psychology. Houghton Mifflin, 1994.
Lua MLA (8ú heag.)MM. Psychology. Houghton Mifflin, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)