United States. Forest Service. (1992). Birds of the Cimarron National Grassland: Pike and San Isabel National Forests, Cimarron & Comanche National Grasslands. U.S.D.A. Forest Service.
Chicago Style (17th ed.) CitationUnited States. Forest Service. Birds of the Cimarron National Grassland: Pike and San Isabel National Forests, Cimarron & Comanche National Grasslands. Elkhart, KS (242 E. Highway 56, P.O. Box J, Elkhart 67950): U.S.D.A. Forest Service, 1992.
MLA (9th ed.) CitationUnited States. Forest Service. Birds of the Cimarron National Grassland: Pike and San Isabel National Forests, Cimarron & Comanche National Grasslands. U.S.D.A. Forest Service, 1992.
Warning: These citations may not always be 100% accurate.