APA (7th ed.) Citation

Klingebiel, A. A., & Montgomery, P. H. (1961). Land-capability classification. U. S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Klingebiel, Albert Arnold, and Paul Hooper Montgomery. Land-capability Classification. [Washington, D.C.]: U. S. Dept. of Agriculture, 1961.

MLA (9th ed.) Citation

Klingebiel, Albert Arnold, and Paul Hooper Montgomery. Land-capability Classification. U. S. Dept. of Agriculture, 1961.