Varghese, P. C. (2012). Engineering geology for civil engineers (Eastern Economy Edition.). PHI Learning.
Chicago-referens (17:e uppl.)Varghese, P. C. Engineering Geology for Civil Engineers. Eastern Economy Edition. New Delhi: PHI Learning, 2012.
MLA-referens (8:e uppl.)Varghese, P. C. Engineering Geology for Civil Engineers. Eastern Economy Edition. PHI Learning, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.