Cita APA (7a ed.)

Leakey, R. E., & Lewin, R. (1992). Origins reconsidered: In search of what makes us human. Little, Braown and Company.

Cita Chicago Style (17a ed.)

Leakey, Richard E., y Roger Lewin. Origins Reconsidered: In Search of What Makes Us Human. London: Little, Braown and Company, 1992.

Cita MLA (9a ed.)

Leakey, Richard E., y Roger Lewin. Origins Reconsidered: In Search of What Makes Us Human. Little, Braown and Company, 1992.