APA (7th ed.) Citation

Anderson, R. L., Anderson, G. W., & Schipper, A. L. (1979). Hypoxylon canker of aspen (Revised October 1979.). U.S. Deptartment of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

Anderson, Ralph L., Gerald W. Anderson, and Arthur L. Schipper. Hypoxylon Canker of Aspen. Revised October 1979. [Washington, D.C.]: U.S. Deptartment of Agriculture, Forest Service, 1979.

MLA (9th ed.) Citation

Anderson, Ralph L., et al. Hypoxylon Canker of Aspen. Revised October 1979. U.S. Deptartment of Agriculture, Forest Service, 1979.