APA-Zitierstil (7. Ausg.)

Bryant, B. (1979). Geology of the Aspen 15-minute quadrangle, Pitkin and Gunnison Counties, Colorado. U.S. Govt. Print. Off.

Chicago-Zitierstil (17. Ausg.)

Bryant, Bruce. Geology of the Aspen 15-minute Quadrangle, Pitkin and Gunnison Counties, Colorado. Washington: U.S. Govt. Print. Off, 1979.

MLA-Zitierstil (9. Ausg.)

Bryant, Bruce. Geology of the Aspen 15-minute Quadrangle, Pitkin and Gunnison Counties, Colorado. U.S. Govt. Print. Off, 1979.