Collis, M. (1975). Ways and means: A unit for teachers. Macdonald Educational.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCollis, Margaret. Ways and Means: A Unit for Teachers. London: Macdonald Educational, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCollis, Margaret. Ways and Means: A Unit for Teachers. Macdonald Educational, 1975.
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