APA (7th ed.) Citation

DeGraff, J. V., & Johnson, R. B. (1988). Principles of engineering geology. John Wiley & Sons.

Chicago Style (17th ed.) Citation

DeGraff, Jerome V., and Robeert B. Johnson. Principles of Engineering Geology. New York: John Wiley & Sons, 1988.

MLA (9th ed.) Citation

DeGraff, Jerome V., and Robeert B. Johnson. Principles of Engineering Geology. John Wiley & Sons, 1988.