CHENG LIU & EVETT, J. B. (1981). Soils and foundations. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)CHENG LIU agus Jack B. EVETT. Soils and Foundations. New Jersey: Prentice-Hall, 1981.
Lua MLA (9ú heag.)CHENG LIU agus Jack B. EVETT. Soils and Foundations. Prentice-Hall, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.