British Geotechnical Society. (1968). Ground Engineering. Geo Publishing.
Citação do estilo Chicago (17ª ed.)British Geotechnical Society. Ground Engineering. Essex, Inglaterra: Geo Publishing, 1968.
Citação MLA (8ª ed.)British Geotechnical Society. Ground Engineering. Geo Publishing, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.