APA (7th ed.) Citation

United States. Forest Service. Southern Research Station & Simon, S. A. (2005). Ecological zones in the southern Appalachians: First approximation. U.S. Dept. of Agriculture, Forest Service, Southern Research Station.

Chicago Style (17th ed.) Citation

United States. Forest Service. Southern Research Station and Steven A. Simon. Ecological Zones in the Southern Appalachians: First Approximation. Asheville, NC: U.S. Dept. of Agriculture, Forest Service, Southern Research Station, 2005.

MLA (9th ed.) Citation

United States. Forest Service. Southern Research Station and Steven A. Simon. Ecological Zones in the Southern Appalachians: First Approximation. U.S. Dept. of Agriculture, Forest Service, Southern Research Station, 2005.