APA

U.S. Geological Survey Global Change Research Forum, Kelmelis J. A., Snow M. & USGS Global Change Coordinating Committee. (1993). Proceedings of the U.S. Geological Survey Global Change Research Forum, Herndon, Virginia, March 18-20, 1991. Washington, D.C: U.S. G.P.O.

Chicago

U.S. Geological Survey Global Change Research Forum, Kelmelis John A, Snow Mitchell and USGS Global Change Coordinating Committee. 1993. Proceedings of the U.S. Geological Survey Global Change Research Forum, Herndon, Virginia, March 18-20, 1991. Washington, D.C: U.S. G.P.O.

Harvard

U.S. Geological Survey Global Change Research Forum, Kelmelis J. A., Snow M. and USGS Global Change Coordinating Committee. (1993). Proceedings of the U.S. Geological Survey Global Change Research Forum, Herndon, Virginia, March 18-20, 1991. Washington, D.C: U.S. G.P.O.

MLA

U.S. Geological Survey Global Change Research Forum, Kelmelis John A, Snow Mitchell and USGS Global Change Coordinating Committee. Proceedings of the U.S. Geological Survey Global Change Research Forum, Herndon, Virginia, March 18-20, 1991. Washington, D.C: U.S. G.P.O. 1993.