APA (7th ed.) Zitazioa
Levinson, D. J. (1978). The seasons of a man's Life. Ballantine.
Chicago Style (17th ed.) Zitazioa
Levinson, Daniel J. The Seasons of a Man's Life. New York: Ballantine, 1978.
MLA (9th ed.) Zitazioa
Levinson, Daniel J. The Seasons of a Man's Life. Ballantine, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.