Cita APA

Seligman, M. E. P. 1. (1975). Helplessness: On depression, development and death. San Francisco: W. H. Freeman and Company.

Citación estilo Chicago

Seligman, Martin E. P. 1942-. Helplessness: On Depression, Development and Death. San Francisco: W. H. Freeman and Company, 1975.

Cita MLA

Seligman, Martin E. P. 1942-. Helplessness: On Depression, Development and Death. San Francisco: W. H. Freeman and Company, 1975.