APA (7th ed.) Citation

Carter, E., Carter, L., & Thomson, K. (2011). Haleakalā: Junior ranger activity book. National Park Service.

Chicago Style (17th ed.) Citation

Carter, Eliot, Lisa Carter, and Katelyn Thomson. Haleakalā: Junior Ranger Activity Book. [Washington, D.C.?]: National Park Service, 2011.

MLA (9th ed.) Citation

Carter, Eliot, et al. Haleakalā: Junior Ranger Activity Book. National Park Service, 2011.