Seligman, M. E. (1990). Learned optimism. Pocket bks..
Lua i Stíl Chicago (17ú heag.)Seligman, Martin E.P. Learned Optimism. New York: Pocket bks., 1990.
Lua MLA (9ú heag.)Seligman, Martin E.P. Learned Optimism. Pocket bks., 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.