Cita APA (7a ed.)

American Psychological Association & Chang, E. C. (2002). Optimism & pessimism: Implications for theory, research, and practice (2nd print.). American Psychological Association.

Cita Chicago Style (17a ed.)

American Psychological Association y Edward C. Chang. Optimism & Pessimism: Implications for Theory, Research, and Practice. 2nd print. Washington: American Psychological Association, 2002.

Cita MLA (9a ed.)

American Psychological Association y Edward C. Chang. Optimism & Pessimism: Implications for Theory, Research, and Practice. 2nd print. American Psychological Association, 2002.