APA Citation

Fredrickson, B. (2009). Positivity (1a edición.). New York: Crown Business.

Chicago Style Citation

Fredrickson, Barbara. Positivity. 1a edición. New York: Crown Business, 2009.

MLA Citation

Fredrickson, Barbara. Positivity. 1a edición. New York: Crown Business, 2009.

Warning: These citations may not always be 100% accurate.