एपीए उद्धरण

Varghese, P. (2012). Engineering geology for civil engineers. PHI Learning.

शिकागो स्टाइल उद्धरण

Varghese, P.C. Engineering Geology for Civil Engineers. New Delhi: PHI Learning, 2012.

एमएलए उद्धरण

Varghese, P.C. Engineering Geology for Civil Engineers. PHI Learning, 2012.