APA (7th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. (1942). Relationship of insects to spread of azalea flower spot. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Relationship of Insects to Spread of Azalea Flower Spot. [Washington]: [s.n.], 1942.

MLA (9th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Relationship of Insects to Spread of Azalea Flower Spot. [s.n.], 1942.