APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Peterson, Christopher, and Martin E. P. Seligman. Character Strengths and Virtues: A Handbook and Classification. Oxford [u.a.]: Oxford Univ. Press, 2004.

MLA (9th ed.) Citation

Peterson, Christopher, and Martin E. P. Seligman. Character Strengths and Virtues: A Handbook and Classification. Oxford Univ. Press, 2004.