Varghese, P. (2012). Engineering geology for civil engineers. PHI Learning.
Chicago Style aipamenaVarghese, P.C. Engineering Geology for Civil Engineers. New Delhi: PHI Learning, 2012.
MLA aipamenaVarghese, P.C. Engineering Geology for Civil Engineers. PHI Learning, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.