Não informado. (1970). Planning & Changing. Illinois State University, Department of Educational Administration.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Planning & Changing. Normal, Ill: Illinois State University, Department of Educational Administration, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Planning & Changing. Illinois State University, Department of Educational Administration, 1970.
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