Cita APA

Long, L. E., & Long, L. E. (1974). Geology. New York: McGraw-Hill.

Citación estilo Chicago

Long, Leon E., y Leon E. Long. Geology. New York: McGraw-Hill, 1974.

Cita MLA

Long, Leon E., y Leon E. Long. Geology. New York: McGraw-Hill, 1974.