Leftwich, A. (1990). New developments in political science: An international review of achievements and prospects. E. Elgar.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLeftwich, Adrian. New Developments in Political Science: An International Review of Achievements and Prospects. Aldershot, Hants, England: E. Elgar, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLeftwich, Adrian. New Developments in Political Science: An International Review of Achievements and Prospects. E. Elgar, 1990.
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