APA (7e ed.) Bronvermelding

Seligman, M. E. (1990). Learned optimism. Pocket bks..

Chicago (17e ed.) Bronvermelding

Seligman, Martin E.P. Learned Optimism. New York: Pocket bks., 1990.

MLA (9e ed.) Bronvermelding

Seligman, Martin E.P. Learned Optimism. Pocket bks., 1990.