APA (7th ed.) Citation

Klages, K. H. (1942). Ecological crop geography. Macmillan.

Chicago Style (17th ed.) Citation

Klages, Karl H. Ecological Crop Geography. New York: Macmillan, 1942.

MLA (9th ed.) Citation

Klages, Karl H. Ecological Crop Geography. Macmillan, 1942.

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