Billingham, M. (2012). The demands (1st U.S. ed.). Little, Brown and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBillingham, Mark. The Demands. 1st U.S. ed. New York: Little, Brown and Company, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBillingham, Mark. The Demands. 1st U.S. ed. Little, Brown and Company, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.