Cita APA (7a ed.)

Tudge, C. (1996). The time before history: 5 million years of human impact. Scribner.

Cita Chicago Style (17a ed.)

Tudge, Colin. The Time Before History: 5 Million Years of Human Impact. New York: Scribner, 1996.

Cita MLA (8a ed.)

Tudge, Colin. The Time Before History: 5 Million Years of Human Impact. Scribner, 1996.