APA (7th ed.) Citation

Engeln, O. V. Geomorphology system and regional. The macmillan Company.

Chicago Style (17th ed.) Citation

Engeln, O.D. Von. Geomorphology System and Regional. The macmillan Company.

MLA (8th ed.) Citation

Engeln, O.D. Von. Geomorphology System and Regional. The macmillan Company.

Warning: These citations may not always be 100% accurate.