APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Krar, Stephen F., and James William Oswald. Drilling Technolgy. New York: Delmar, 1977.

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.