Peterson, C., Maier, S. F., & Seligman, M. E. P. (1995). Learned helplessness: A theory for the age of personal control. Oxford University Press.
Chicago (17e ed.) BronvermeldingPeterson, Christopher, Steven F. Maier, en Martin E. P. Seligman. Learned Helplessness: A Theory for the Age of Personal Control. New York: Oxford University Press, 1995.
MLA (9e ed.) BronvermeldingPeterson, Christopher, et al. Learned Helplessness: A Theory for the Age of Personal Control. Oxford University Press, 1995.
Let op: Deze citaties zijn niet altijd 100% accuraat.