National park system map and guide
MLA
National Park System Map and Guide. [2002 rev. ed.] Washington, DC: Dept. of the Interior, National Park Service , 2002
APA, 7th edition
(2002). National park system map and guide. [2002 rev. ed.] Washington, DC: Dept. of the Interior, National Park Service
Chicago, 17th edition
National park system map and guide. [2002 rev. ed.] Washington, DC: Dept. of the Interior, National Park Service , 2002