Cita APA (7a ed.)

Seligman, M. E. P., & Gillham, J. E. (2000). The science of optimism and Hope: Research essays in honor of Martin E.P. Seligman. Templeton Foundation Press.

Cita Chicago Style (17a ed.)

Seligman, Martin E. P., y Jane E. Gillham. The Science of Optimism and Hope: Research Essays in Honor of Martin E.P. Seligman. Philadelphia ; London: Templeton Foundation Press, 2000.

Cita MLA (9a ed.)

Seligman, Martin E. P., y Jane E. Gillham. The Science of Optimism and Hope: Research Essays in Honor of Martin E.P. Seligman. Templeton Foundation Press, 2000.