HAMMOND ALLEN. (1998). WHICH WORLD? SCENARIOS FOR THE 21ST CENTURY. EARTHSCAN.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHAMMOND ALLEN. WHICH WORLD? SCENARIOS FOR THE 21ST CENTURY. LONDON: EARTHSCAN, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHAMMOND ALLEN. WHICH WORLD? SCENARIOS FOR THE 21ST CENTURY. EARTHSCAN, 1998.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.