APA (7 वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, & Harry, K. (1999). Higher education through open and distance learning. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, और Keith Harry. Higher Education Through Open and Distance Learning. London ; New York: Routledge, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
ebrary, Inc, और Keith Harry. Higher Education Through Open and Distance Learning. Routledge, 1999.
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