APA (7th ed.) Citation

DuFresne, J., & Maass, S. (1984). Isle Royale National Park: Foot trails & water routes. Mountaineers.

Chicago Style (17th ed.) Citation

DuFresne, Jim, and Steve Maass. Isle Royale National Park: Foot Trails & Water Routes. Seattle: Mountaineers, 1984.

MLA (9th ed.) Citation

DuFresne, Jim, and Steve Maass. Isle Royale National Park: Foot Trails & Water Routes. Mountaineers, 1984.