Cita APA (7th ed.)

Silverberg, R. (1964). Man before Adam: The story of man in search of his origins. Macrae Smith.

Cita Chicago (17th ed.)

Silverberg, Robert. Man Before Adam: The Story of Man in Search of His Origins. Philadelphia: Macrae Smith, 1964.

Cita MLA (9th ed.)

Silverberg, Robert. Man Before Adam: The Story of Man in Search of His Origins. Macrae Smith, 1964.