Wolf Tony. (2009). The book of the earth, many questions and many answers. Euro Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWolf Tony. The Book of the Earth, Many Questions and Many Answers. Mumbai: Euro Books, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWolf Tony. The Book of the Earth, Many Questions and Many Answers. Euro Books, 2009.
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