Darley, J. M., Glucksberg, S., & Kinchla, R. A. (1991). Psychology. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Darley, John M., Sam Glucksberg, agus Ronald A. Kinchla. Psychology. Englewood Cliffs, New Jersey: Prentice-Hall, 1991.
Lua MLA (9ú heag.)Darley, John M., et al. Psychology. Prentice-Hall, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.