Cita APA (7a ed.)

Peterson, C., & Seligman, M. (2004). Character strengths and virtues: A handbook and classification. Oxford University Press.

Cita Chicago Style (17a ed.)

Peterson, Christopher, y Martin Seligman. Character Strengths and Virtues: A Handbook and Classification. Washington, DC: Oxford University Press, 2004.

Cita MLA (9a ed.)

Peterson, Christopher, y Martin Seligman. Character Strengths and Virtues: A Handbook and Classification. Oxford University Press, 2004.