Perraton, H. D. (1982). Alternative routes to formal education: Distance teaching for school equivalency. Published for the World Bank [by] Johns Hopkins University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerraton, H. D. Alternative Routes to Formal Education: Distance Teaching for School Equivalency. Baltimore: Published for the World Bank [by] Johns Hopkins University Press, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPerraton, H. D. Alternative Routes to Formal Education: Distance Teaching for School Equivalency. Published for the World Bank [by] Johns Hopkins University Press, 1982.
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