British Geotechnical Society. (1968). Ground Engineering. Geo Publishing.
Lua i Stíl Chicago (17ú heag.)British Geotechnical Society. Ground Engineering. Essex, Inglaterra: Geo Publishing, 1968.
Lua MLA (8ú heag.)British Geotechnical Society. Ground Engineering. Geo Publishing, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.