(2012). THE PEOPLE WHO CHANGED THE WORLD KARL MARX: MOST INFLUENTIAL PHILOSOPHER OF THE MODERN WORLD (1st.). VIJAY GOEL.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTHE PEOPLE WHO CHANGED THE WORLD KARL MARX: MOST INFLUENTIAL PHILOSOPHER OF THE MODERN WORLD. 1st. NEW DELHI: VIJAY GOEL, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTHE PEOPLE WHO CHANGED THE WORLD KARL MARX: MOST INFLUENTIAL PHILOSOPHER OF THE MODERN WORLD. 1st. VIJAY GOEL, 2012.
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