America's hidden treasures :
exploring our little-known national parks /
prepared by the Book Division, National Geographic Society.

APA Citation

National Geographic Society (U.S.). Book Division. (1992). America's hidden treasures: exploring our little-known national parks. Washington, D.C.: National Geographic Society.

MLA Citation

National Geographic Society (U.S.). Book Division. America's Hidden Treasures: Exploring Our Little-known National Parks. Washington, D.C.: National Geographic Society, 1992.

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