Frank, R. (2004). Designers' guide to EN 1997-1 eurocode 7: Geotechnical design, general rules. London, UK. : Thomas Telford Ltd..
Lua i Stíl Chicago (17ú heag.)Frank, R. Designers' Guide to EN 1997-1 Eurocode 7: Geotechnical Design, General Rules. London, UK. : Thomas Telford Ltd., 2004.
Lua MLA (9ú heag.)Frank, R. Designers' Guide to EN 1997-1 Eurocode 7: Geotechnical Design, General Rules. London, UK. : Thomas Telford Ltd., 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.