APA (7th ed.) Citation

Hummel, W. G., & Hummel, B. R. (1913). Materials and methods in high school agriculture. Macmillan.

Chicago Style (17th ed.) Citation

Hummel, William Granville, and Bertha Royce Hummel. Materials and Methods in High School Agriculture. New York: Macmillan, 1913.

MLA (9th ed.) Citation

Hummel, William Granville, and Bertha Royce Hummel. Materials and Methods in High School Agriculture. Macmillan, 1913.