Ridley, F. (1975). The study of government: Political science and public administration. George Allen and Unwin Ltd.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRidley, F.F. The Study of Government: Political Science and Public Administration. George Allen and Unwin Ltd, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRidley, F.F. The Study of Government: Political Science and Public Administration. George Allen and Unwin Ltd, 1975.
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