APA (7th ed.) Citation

Obert, L., & Duvall, W. I. (1967). Rock mechanics and the design of structures in rock. Wiley.

Chicago Style (17th ed.) Citation

Obert, Leonard, and Wilbur I. Duvall. Rock Mechanics and the Design of Structures in Rock. New York: Wiley, 1967.

MLA (9th ed.) Citation

Obert, Leonard, and Wilbur I. Duvall. Rock Mechanics and the Design of Structures in Rock. Wiley, 1967.