APA
Snyder C. R., Lopez S. J., . (2009). Positive Psychology: The Scientific and Practical Explorations of Human Strengths. New Delhi: Sage.
Chicago
Snyder C R, Lopez Shane J, . 2009. Positive Psychology: The Scientific and Practical Explorations of Human Strengths. New Delhi: Sage.
Harvard
Snyder C. R., Lopez S. J., . (2009). Positive Psychology: The Scientific and Practical Explorations of Human Strengths. New Delhi: Sage.
MLA
Snyder C R, Lopez Shane J, . Positive Psychology: The Scientific and Practical Explorations of Human Strengths. New Delhi: Sage. 2009.