APA Style

Snyder, C, R., Lopez, S, J. (c2007). Positive psychology : the scientific and practical explorations of human strengths . Thousand Oaks: SAGE Publications.

MLA Style

Snyder, C., R.., Lopez, Shane, J.. "Positive psychology : the scientific and practical explorations of human strengths". Thousand Oaks: SAGE Publications, c2007. Text.