APA (7th ed.) Citation

United States. Forest Service. Alaska Region. (2001). Engraver beetles in Alaskan forests. The Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Alaska Region. Engraver Beetles in Alaskan Forests. [Washington, D.C.?]: The Service, 2001.

MLA (9th ed.) Citation

United States. Forest Service. Alaska Region. Engraver Beetles in Alaskan Forests. The Service, 2001.

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