Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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