Johnson, J. B., & Johnson, J. B. (1987). Political science research methods. Prentice-Hall of India.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, Janet Buttolph, और Janet Buttolph;Joslyn Johnson. Political Science Research Methods. Prentice-Hall of India, 1987.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJohnson, Janet Buttolph, और Janet Buttolph;Joslyn Johnson. Political Science Research Methods. Prentice-Hall of India, 1987.
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