Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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