Nagle John D. (1989). Introduction to comparative politics: Political system performance in the three worlds (2nd. ed.). Nelson-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNagle John D. Introduction to Comparative Politics: Political System Performance in the Three Worlds. 2nd. ed. Chicago: Nelson-Hall, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNagle John D. Introduction to Comparative Politics: Political System Performance in the Three Worlds. 2nd. ed. Nelson-Hall, 1989.
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