Cita APA (7a ed.)

Engeln, O. V. (1948). 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, 1948.

Cita MLA (9a ed.)

Engeln, O.D. Von. Geomorphology: Systematic and Regional. The Macmillan Company, 1948.