Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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