Cita APA (7a ed.)

Engeln, O. D. v. (1942). Geomorphology, systematic and regional. The Macmillan Company.

Cita Chicago Style (17a ed.)

Engeln, O. D. von. Geomorphology, Systematic and Regional. New York: The Macmillan Company, 1942.

Cita MLA (9a ed.)

Engeln, O. D. von. Geomorphology, Systematic and Regional. The Macmillan Company, 1942.