Easton, D. (1971). The political system: An inquiry into the state of political science. Scientific Book Agency.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEaston, David. The Political System: An Inquiry into the State of Political Science. Scientific Book Agency, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEaston, David. The Political System: An Inquiry into the State of Political Science. Scientific Book Agency, 1971.
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