Cita APA (7a ed.)

Stone, I. (1981). The Origin: A biographical novel of Charles Darwin. Cassell.

Cita Chicago Style (17a ed.)

Stone, Irving. The Origin: A Biographical Novel of Charles Darwin. London: Cassell, 1981.

Cita MLA (9a ed.)

Stone, Irving. The Origin: A Biographical Novel of Charles Darwin. Cassell, 1981.