APA (7th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. (1944). Sticky trap board used in scouting for pear psylla. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Sticky Trap Board Used in Scouting for Pear Psylla. [Washington]: [s.n.], 1944.

MLA (9th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Sticky Trap Board Used in Scouting for Pear Psylla. [s.n.], 1944.