APA (7th ed.) Zitazioa

KEEN, M. L. (1970). Hunting fossils. Julian Messner.

Chicago Style (17th ed.) Zitazioa

KEEN, Martin L. Hunting Fossils. New York: Julian Messner, 1970.

MLA (9th ed.) Zitazioa

KEEN, Martin L. Hunting Fossils. Julian Messner, 1970.