Kagan, J., & Segal, J. (1988). Psychology: An introduction (6th ed.). Harcourt Brace Jovanovich.
Lua i Stíl Chicago (17ú heag.)Kagan, Jerome, agus Julius Segal. Psychology: An Introduction. 6th ed. San Diego: Harcourt Brace Jovanovich, 1988.
Lua MLA (9ú heag.)Kagan, Jerome, agus Julius Segal. Psychology: An Introduction. 6th ed. Harcourt Brace Jovanovich, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.