The national parks :
shaping the system /
produced by the Division of Publications and the Employee Development Division, National Park Service.

APA Citation

Mackintosh, B., United States. National Park Service. Employee Development Division., United States. National Park Service. Division of Publications. (1991). The national parks: shaping the system. Washington: U.S. Dept. of the Interior.

MLA Citation

Mackintosh, Barry, United States. National Park Service. Employee Development Division, and United States. National Park Service. Division of Publications. The National Parks: Shaping the System. Washington: U.S. Dept. of the Interior, 1991.

Warning: These citations may not always be complete (especially for serials).