Engeln, O. D. v. (1942). Geomorphology, systematic and regional. The Macmillan Company.
芝加哥风格引文Engeln, O. D. von. Geomorphology, Systematic and Regional. New York: The Macmillan Company, 1942.
MLA引文Engeln, O. D. von. Geomorphology, Systematic and Regional. The Macmillan Company, 1942.
警告：这些引文格式不一定是100％准确.