APA-referens (7:e uppl.)

Hillel, D. (1972). Optimizing the soil physical environment toward greater crop yields. Academic Press.

Chicago-referens (17:e uppl.)

Hillel, Daniel. Optimizing the Soil Physical Environment Toward Greater Crop Yields. New York: Academic Press, 1972.

MLA-referens (9:e uppl.)

Hillel, Daniel. Optimizing the Soil Physical Environment Toward Greater Crop Yields. Academic Press, 1972.