Handy, R. L., & Spangler, M. G. (2007). Geotechnical engineering: Soil and foundation principles and practice (5th ed.). Mcgraw-Hill.
Lua i Stíl Chicago (17ú heag.)Handy, Richard Lincoln, agus M. G. Spangler. Geotechnical Engineering: Soil and Foundation Principles and Practice. 5th ed. New York: Mcgraw-Hill, 2007.
Lua MLA (9ú heag.)Handy, Richard Lincoln, agus M. G. Spangler. Geotechnical Engineering: Soil and Foundation Principles and Practice. 5th ed. Mcgraw-Hill, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.