APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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