APA (7th ed.) Citation

Perkins, J. (1981). To the ends of the earth: Four expeditions to the Arctic, the Congo, the Gobi, and Siberia. Pantheon Books.

Chicago Style (17th ed.) Citation

Perkins, John. To the Ends of the Earth: Four Expeditions to the Arctic, the Congo, the Gobi, and Siberia. New York: Pantheon Books, 1981.

MLA (9th ed.) Citation

Perkins, John. To the Ends of the Earth: Four Expeditions to the Arctic, the Congo, the Gobi, and Siberia. Pantheon Books, 1981.