Cita APA (7a ed.)

Scofield, J., & Woolfitt, A. (1975). Christopher Columbus and the New World he found. National Geographic Society.

Cita Chicago Style (17a ed.)

Scofield, John, y Adam Woolfitt. Christopher Columbus and the New World He Found. Washington, D.C.: National Geographic Society, 1975.

Cita MLA (9a ed.)

Scofield, John, y Adam Woolfitt. Christopher Columbus and the New World He Found. National Geographic Society, 1975.