APA (7th ed.) Zitazioa

Crofton, I. (1990). The Guinness encyclopedia. Guiness Publishing.

Chicago Style (17th ed.) Zitazioa

Crofton, Ian،. The Guinness Encyclopedia. London: Guiness Publishing, 1990.

MLA (9th ed.) Zitazioa

Crofton, Ian،. The Guinness Encyclopedia. Guiness Publishing, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.