Citazione Stile APA (7a Edizione)

HOLTZ, R. D., & KOVACS, W. D. (1981). An introduction to geotechnical engineering. Prentice-hall.

Citazione stile Chigago Style (17a edizione)

HOLTZ, Robert D., e William D. KOVACS. An Introduction to Geotechnical Engineering. New Jersey: Prentice-hall, 1981.

Citatione MLA (9a ed.)

HOLTZ, Robert D., e William D. KOVACS. An Introduction to Geotechnical Engineering. Prentice-hall, 1981.