(1991). Needles & Maze, Canyonlands National Park, Utah: Two Canyonlands districts, hiking guide, backcountry information (Rev.). Trails Ill.
Chicago-Zitierstil (17. Ausg.)Needles & Maze, Canyonlands National Park, Utah: Two Canyonlands Districts, Hiking Guide, Backcountry Information. Rev. Evergreen, Colo: Trails Ill, 1991.
MLA-Zitierstil (9. Ausg.)Needles & Maze, Canyonlands National Park, Utah: Two Canyonlands Districts, Hiking Guide, Backcountry Information. Rev. Trails Ill, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.