APA (7e ed.) Bronvermelding

Ulrich, A., & Hills, F. J. (1900). Sugar beet nutrient deficiency symptoms: A color atlas and chemical guide. University of California.

Chicago (17e ed.) Bronvermelding

Ulrich, Albert, en F. Jackson Hills. Sugar Beet Nutrient Deficiency Symptoms: A Color Atlas and Chemical Guide. Berkeley: University of California, 1900.

MLA (9e ed.) Bronvermelding

Ulrich, Albert, en F. Jackson Hills. Sugar Beet Nutrient Deficiency Symptoms: A Color Atlas and Chemical Guide. University of California, 1900.