APA (7th ed.) Citation

Krar, S. F., & Oswald, J. W. (1977). Drilling technology. Delmar Publishers.

Chicago Style (17th ed.) Citation

Krar, Stephen F., and James William Oswald. Drilling Technology. Albany, N.Y: Delmar Publishers, 1977.

MLA (8th ed.) Citation

Krar, Stephen F., and James William Oswald. Drilling Technology. Delmar Publishers, 1977.