Engeln, O. D. v. (1942). Geomorphology, systematic and regional. The Macmillan Company.
Chicagoスタイル(17版)引用形式Engeln, O. D. von. Geomorphology, Systematic and Regional. New York: The Macmillan Company, 1942.
MLA(9版)引用形式Engeln, O. D. von. Geomorphology, Systematic and Regional. The Macmillan Company, 1942.
警告: この引用は必ずしも正確ではありません.