Darley, J. M. (1988). Psychology (4th ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Darley, John M. Psychology. 4th ed. Englewood Cliffs, New Jersey: Prentice-Hall, 1988.
Lua MLA (9ú heag.)Darley, John M. Psychology. 4th ed. Prentice-Hall, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.