APA (7th ed.) Zitazioa
Goldstein Sue. (1991). Great buys: For people over 50. Penguin Books.
Chicago Style (17th ed.) Zitazioa
Goldstein Sue. Great Buys: For People over 50. New York: Penguin Books, 1991.
MLA (9th ed.) Zitazioa
Goldstein Sue. Great Buys: For People over 50. Penguin Books, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.