Cita APA

Leet, F. J., & Leet, L. D. n. 1. (1961). The World of geology. New York, New York: McGraw-Hill.

Citación estilo Chicago

Leet, Florence J., y Lewis Don n. 1901 Leet. The World of Geology. New York, New York: McGraw-Hill, 1961.

Cita MLA

Leet, Florence J., y Lewis Don n. 1901 Leet. The World of Geology. New York, New York: McGraw-Hill, 1961.