Peterson, C., Maier, S. F., & Seligman, M. E. P. (1995). Learned helplessness: A theory for the age of personal control. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Peterson, Christopher, Steven F. Maier, agus Martin E. P. Seligman. Learned Helplessness: A Theory for the Age of Personal Control. New York: Oxford University Press, 1995.
Lua MLA (9ú heag.)Peterson, Christopher, et al. Learned Helplessness: A Theory for the Age of Personal Control. Oxford University Press, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.