Não informado. (2004). Educational administration and supervision. Warwick & York.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Educational Administration and Supervision. Baltimore, Md: Warwick & York, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Educational Administration and Supervision. Warwick & York, 2004.
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