APA (7th ed.) Zitazioa
Houston, J. (1989). The transforming friendship. A lion book.
Chicago Style (17th ed.) Zitazioa
Houston, James. The Transforming Friendship. Oxford: A lion book, 1989.
MLA (9th ed.) Zitazioa
Houston, James. The Transforming Friendship. A lion book, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.