APA (7th ed.) Citation

United States. National Park Service. (2006). Big Thicket National Preserve, Texas ([2006 revised edition].). National Park Service.

Chicago Style (17th ed.) Citation

United States. National Park Service. Big Thicket National Preserve, Texas. [2006 revised edition]. [Washington, D.C.]: National Park Service, 2006.

MLA (9th ed.) Citation

United States. National Park Service. Big Thicket National Preserve, Texas. [2006 revised edition]. National Park Service, 2006.