Garber, J., & Seligman, M. E. P. (1980). Human helplessness: Theory and applications. Academic Press.
Cita Chicago Style (17a ed.)Garber, Judy, y Martin E. P. Seligman. Human Helplessness: Theory and Applications. New York [etc.]: Academic Press, 1980.
Cita MLA (9a ed.)Garber, Judy, y Martin E. P. Seligman. Human Helplessness: Theory and Applications. Academic Press, 1980.
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