APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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