Cita APA

SIMPSON, G. G. (1964). Life of the past: An introductionto paleontology. YaleUniversity.

Citación estilo Chicago

SIMPSON, George Gaylord. Life of the Past: An Introductionto Paleontology. London: YaleUniversity, 1964.

Cita MLA

SIMPSON, George Gaylord. Life of the Past: An Introductionto Paleontology. YaleUniversity, 1964.

Warning: These citations may not always be 100% accurate.