Cita APA

Nunn, G. E. n. 1., & Nunn, G. E. n. 1. (1924). The geographical conceptions of Columbus: A critical consideration of four problems. New York, New York: American Geographical Society.

Citación estilo Chicago

Nunn, George E. n. 1882, y George E. n. 1882 Nunn. The Geographical Conceptions of Columbus: A Critical Consideration of Four Problems. New York, New York: American Geographical Society, 1924.

Cita MLA

Nunn, George E. n. 1882, y George E. n. 1882 Nunn. The Geographical Conceptions of Columbus: A Critical Consideration of Four Problems. New York, New York: American Geographical Society, 1924.