APA (7th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. (1939). Vapor--heat treatment for control of narcissus bulb pests in Pacific Northwest. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Vapor--heat Treatment for Control of Narcissus Bulb Pests in Pacific Northwest. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Vapor--heat Treatment for Control of Narcissus Bulb Pests in Pacific Northwest. [s.n.], 1939.