Hefferon, K., & Lomas, T. (2015). Positive psychology. SAGE Reference.
Chicago Style (17th ed.) CitationHefferon, Kate, and Tim Lomas. Positive Psychology. Los Angeles: SAGE Reference, 2015.
MLA (9th ed.) CitationHefferon, Kate, and Tim Lomas. Positive Psychology. SAGE Reference, 2015.
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