(1973). Map of pioneer trails, stage stops, and areas with a view in the Parker quadrangle, Arapahoe and Douglas counties, Colorado. U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Map of Pioneer Trails, Stage Stops, and Areas with a View in the Parker Quadrangle, Arapahoe and Douglas Counties, Colorado. Washington, D.C: U.S. Geological Survey, 1973.
MLA-Zitierstil (9. Ausg.)Map of Pioneer Trails, Stage Stops, and Areas with a View in the Parker Quadrangle, Arapahoe and Douglas Counties, Colorado. U.S. Geological Survey, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.