APA (7th ed.) Citation

Joshua Tree National Park (Agency : U.S.) & Elder, C. (2010). Junior Ranger official program and activity booklet: Joshua Tree National Park. Joshua Tree National Park.

Chicago Style (17th ed.) Citation

Joshua Tree National Park (Agency : U.S.) and Christine Elder. Junior Ranger Official Program and Activity Booklet: Joshua Tree National Park. Twentynine Palms, CA: Joshua Tree National Park, 2010.

MLA (9th ed.) Citation

Joshua Tree National Park (Agency : U.S.) and Christine Elder. Junior Ranger Official Program and Activity Booklet: Joshua Tree National Park. Joshua Tree National Park, 2010.