Gill, K. (1986). International research centers directory (3rd ed.). Gale Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGill, Kay. International Research Centers Directory. 3rd ed. Detroit, MI: Gale Research, 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGill, Kay. International Research Centers Directory. 3rd ed. Gale Research, 1986.
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