Varghese, P. C. (2012). Engineering geology for civil engineers (Eastern Economy Edition.). PHI Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVarghese, P. C. Engineering Geology for Civil Engineers. Eastern Economy Edition. New Delhi: PHI Learning, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVarghese, P. C. Engineering Geology for Civil Engineers. Eastern Economy Edition. PHI Learning, 2012.
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