APA (7th ed.) Zitazioa
Holtz, R. D., Kovacs, W. D., & Sheahan,Thomas C. (2013). An introduction to geotechnical engineering (2nd ed.). Pearson Education.
Chicago Style (17th ed.) Zitazioa
Holtz, Robert D., William D. Kovacs, eta Sheahan,Thomas C. An Introduction to Geotechnical Engineering. 2nd ed. Noida: Pearson Education, 2013.
MLA (9th ed.) Zitazioa
Holtz, Robert D., et al. An Introduction to Geotechnical Engineering. 2nd ed. Pearson Education, 2013.
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