APA (7th ed.) Citation

Williams, A., & Stevens, L. (2012). Colorado National Monument: Junior Ranger activity guide. National Park Foundation.

Chicago Style (17th ed.) Citation

Williams, Annie, and Lace Stevens. Colorado National Monument: Junior Ranger Activity Guide. [Washington, DC]: National Park Foundation, 2012.

MLA (9th ed.) Citation

Williams, Annie, and Lace Stevens. Colorado National Monument: Junior Ranger Activity Guide. National Park Foundation, 2012.