"Hall, G. (1973). Imperialism today: An evaluation of major issues and events of our time. International pub.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Hall, Gus". Imperialism Today: An Evaluation of Major Issues and Events of Our Time. International pub, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Hall, Gus". Imperialism Today: An Evaluation of Major Issues and Events of Our Time. International pub, 1973.
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