(2007). The Americana Annual 2007The Encyclopedia of the Events of 2006, Yearbook of the encyclopedia Americana. The World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThe Americana Annual 2007The Encyclopedia of the Events of 2006, Yearbook of the Encyclopedia Americana. The World Bank, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रThe Americana Annual 2007The Encyclopedia of the Events of 2006, Yearbook of the Encyclopedia Americana. The World Bank, 2007.
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