Gupta, A. (2001). A billion is not enough: India's population problem - a way out. IMH Pubs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGupta, Ashok. A Billion Is Not Enough: India's Population Problem - a Way Out. IMH Pubs, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGupta, Ashok. A Billion Is Not Enough: India's Population Problem - a Way Out. IMH Pubs, 2001.
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