APA (7th ed.) Citation

Holtz, R. D., Kovacs, W. D., & Sheahan, T. C. An introduction to geotechnical engineering (2a ed.).

Chicago Style (17th ed.) Citation

Holtz, Robert D., William D. Kovacs, and Thomas C. Sheahan. An Introduction to Geotechnical Engineering. 2a ed.

MLA (8th ed.) Citation

Holtz, Robert D., et al. An Introduction to Geotechnical Engineering. 2a ed.