APA-Zitierstil (7. Ausg.)

(1965). Preliminary geologic map of the Berthoud Pass quadrangle Clear Creek and Grand counties, Colorado. U.S. Geological Survey.

Chicago-Zitierstil (17. Ausg.)

Preliminary Geologic Map of the Berthoud Pass Quadrangle Clear Creek and Grand Counties, Colorado. Washington, D.C: U.S. Geological Survey, 1965.

MLA-Zitierstil (9. Ausg.)

Preliminary Geologic Map of the Berthoud Pass Quadrangle Clear Creek and Grand Counties, Colorado. U.S. Geological Survey, 1965.