APA (7th ed.) Citation

United States. Bureau of Entomology. (1920). Brief information on injury to spruce and fir by spruce bud-worm. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Entomology. Brief Information on Injury to Spruce and Fir by Spruce Bud-worm. [Washington]: [publisher not identified], 1920.

MLA (9th ed.) Citation

United States. Bureau of Entomology. Brief Information on Injury to Spruce and Fir by Spruce Bud-worm. [publisher not identified], 1920.

Warning: These citations may not always be 100% accurate.