APA (7th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. (1937). Fir engraver beetle, serious enemy of white fir and red fir. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Fir Engraver Beetle, Serious Enemy of White Fir and Red Fir. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Fir Engraver Beetle, Serious Enemy of White Fir and Red Fir. [s.n.], 1937.