Style de citation APA (7e éd.)

Fredrickson, B. (2009). Positivity (First edition.). Three Rivers Press.

Style de citation Chicago (17e éd.)

Fredrickson, Barbara. Positivity. First edition. New York: Three Rivers Press, 2009.

Style de citation MLA (9e éd.)

Fredrickson, Barbara. Positivity. First edition. Three Rivers Press, 2009.