APA-referens (7:e uppl.)

KOHNKE, H. (1979). Soil physics. TATA McGraw-Hill Publishing.

Chicago-referens (17:e uppl.)

KOHNKE, Helmut. Soil Physics. New Delhi: TATA McGraw-Hill Publishing, 1979.

MLA-referens (9:e uppl.)

KOHNKE, Helmut. Soil Physics. TATA McGraw-Hill Publishing, 1979.