Cita APA (7a ed.)
Earle, S. A., Hopkins, R. L., Montaigne, F., Murphy, E. M., & Wysession, M. E. Polar Explorations: Science and Discovery at the Ends of the Earth. Teaching Company ; National Geographic Society.
Cita estilo Chicago (17a ed.)
Earle, Sylvia A., Ralph Lee Hopkins, Fen Montaigne, Edward M. Murphy, y Michael E. Wysession. Polar Explorations: Science and Discovery at the Ends of the Earth. Chantilly, EUA : Washington, EUA: Teaching Company ; National Geographic Society.
Cita MLA (9a ed.)
Earle, Sylvia A., et al. Polar Explorations: Science and Discovery at the Ends of the Earth. Teaching Company ; National Geographic Society.
Precaución: Estas citas no son 100% exactas.