Cita APA (7th ed.)

Peterson, C., Maier, S. F., & Seligman, M. E. P. (1995). Learned helplessness: A theory for the age of personal control. Oxford University Press.

Cita Chicago (17th ed.)

Peterson, Christopher, Steven F. Maier, i Martin E. P. Seligman. Learned Helplessness: A Theory for the Age of Personal Control. New York: Oxford University Press, 1995.

Cita MLA (9th ed.)

Peterson, Christopher, et al. Learned Helplessness: A Theory for the Age of Personal Control. Oxford University Press, 1995.