Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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