APA (7th ed.) Citation

Wilford, J. N. (1981). The mapmakers (1. ed.). Knopf.

Chicago Style (17th ed.) Citation

Wilford, John Noble. The Mapmakers. 1. ed. New York: Knopf, 1981.

MLA (9th ed.) Citation

Wilford, John Noble. The Mapmakers. 1. ed. Knopf, 1981.