APA (7th ed.) Citation

Gibson, K. E., Kegley, S., & Bentz, B. J. (2009). Mountain pine beetle (Revised May 2009.). USDA Forest Service, Pacific Northwest Region (R 6).

Chicago Style (17th ed.) Citation

Gibson, Kenneth E., Sandy Kegley, and Barbara J. Bentz. Mountain Pine Beetle. Revised May 2009. Portland, Oregon: USDA Forest Service, Pacific Northwest Region (R 6), 2009.

MLA (9th ed.) Citation

Gibson, Kenneth E., et al. Mountain Pine Beetle. Revised May 2009. USDA Forest Service, Pacific Northwest Region (R 6), 2009.