Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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