United States. Forest Service & North American Butterfly Association. (2011). Butterflies of the Green Mountain National Forest. U.S. Dept. of Agriculture, Forest Service.
Chicago Style (17th ed.) CitationUnited States. Forest Service and North American Butterfly Association. Butterflies of the Green Mountain National Forest. [Washington, D.C.]: U.S. Dept. of Agriculture, Forest Service, 2011.
MLA (9th ed.) CitationUnited States. Forest Service and North American Butterfly Association. Butterflies of the Green Mountain National Forest. U.S. Dept. of Agriculture, Forest Service, 2011.
Warning: These citations may not always be 100% accurate.