Poulos, H. (1980). Pile Foundation Analysis And Design/Poulos, H.g. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Poulos, H.G. Pile Foundation Analysis And Design/Poulos, H.g. John Wiley & Sons, 1980.
Lua MLA (8ú heag.)Poulos, H.G. Pile Foundation Analysis And Design/Poulos, H.g. John Wiley & Sons, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.