Não informado. (1970). Planning & Changing. Illinois State University, Department of Educational Administration.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Planning & Changing. Normal, Ill: Illinois State University, Department of Educational Administration, 1970.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Planning & Changing. Illinois State University, Department of Educational Administration, 1970.
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