Cita APA (7a ed.)

Stone, I., & Stone, J. (1980). The origin: A biographical novel of Charles Darwin. Doubleday & Company.

Cita Chicago Style (17a ed.)

Stone, Irving, y Jean Stone. The Origin: A Biographical Novel of Charles Darwin. Garden City, New York: Doubleday & Company, 1980.

Cita MLA (9a ed.)

Stone, Irving, y Jean Stone. The Origin: A Biographical Novel of Charles Darwin. Doubleday & Company, 1980.