Whitlow, R. (1999). Basic soil mechanics. Longman.
Lua i Stíl Chicago (17ú heag.)Whitlow, R. Basic Soil Mechanics. Longman, 1999.
Lua MLA (8ú heag.)Whitlow, R. Basic Soil Mechanics. Longman, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.