APA (7th ed.) Citation

Snyder, C. R., & Lopez, S. J. (2006). Positive psychology: The scientific and practical explorations of human strengths. SAGE Publ.

Chicago Style (17th ed.) Citation

Snyder, C. R., and Shane J. Lopez. Positive Psychology: The Scientific and Practical Explorations of Human Strengths. Thousand Oaks [u.a.]: SAGE Publ, 2006.

MLA (9th ed.) Citation

Snyder, C. R., and Shane J. Lopez. Positive Psychology: The Scientific and Practical Explorations of Human Strengths. SAGE Publ, 2006.