APA (7th ed.) Citation

United States. Bureau of Plant Industry. (1937). Certain chemical and physical changes produced in Kieffer pears during ripening and storage. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Plant Industry. Certain Chemical and Physical Changes Produced in Kieffer Pears During Ripening and Storage. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Bureau of Plant Industry. Certain Chemical and Physical Changes Produced in Kieffer Pears During Ripening and Storage. [s.n.], 1937.