APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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