Cita APA (7a ed.)

Seligman, M. E. P. (1975). Helplessness: On depression, development, and death. W.H. Freeman.

Cita Chicago Style (17a ed.)

Seligman, Martin E. P. Helplessness: On Depression, Development, and Death. San Francisco: W.H. Freeman, 1975.

Cita MLA (9a ed.)

Seligman, Martin E. P. Helplessness: On Depression, Development, and Death. W.H. Freeman, 1975.