APA (7th ed.) Citation

Wahlstrom, E. E., Robinson, C. S., & Hornback, V. Q. (1981). Geology of the western part of the Harold D. Roberts Tunnel, Colorado (Stations 0+00 to 690+00). U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Wahlstrom, Ernest E., Charles Sherwood Robinson, and V. Quentin Hornback. Geology of the Western Part of the Harold D. Roberts Tunnel, Colorado (Stations 0+00 to 690+00). Washington: U.S. Govt. Print. Off, 1981.

MLA (9th ed.) Citation

Wahlstrom, Ernest E., et al. Geology of the Western Part of the Harold D. Roberts Tunnel, Colorado (Stations 0+00 to 690+00). U.S. Govt. Print. Off, 1981.