Wadhwa, O. (1973). Centre state and inter state: relations in India 1919-1970: A bibliography. Vidya Mandal.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWadhwa, O.P. Centre State and Inter State: Relations in India 1919-1970: A Bibliography. Vidya Mandal, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWadhwa, O.P. Centre State and Inter State: Relations in India 1919-1970: A Bibliography. Vidya Mandal, 1973.
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