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.