Engeln, O. V. Geomorphology system and regional. The macmillan Company.
Chicago Style (17th ed.) CitationEngeln, O.D. Von. Geomorphology System and Regional. The macmillan Company.
MLA (8th ed.) CitationEngeln, O.D. Von. Geomorphology System and Regional. The macmillan Company.
Warning: These citations may not always be 100% accurate.