Campbell, R. F., & Gregg, R. T. (1957). Administrative behavior in education. New York: Harper & Brothers.
Παραπομπή Chicago StyleCampbell, Roald F., and Russell T. Gregg. Administrative Behavior in Education. New York: Harper & Brothers, 1957.
Παραπομπή MLACampbell, Roald F., and Russell T. Gregg. Administrative Behavior in Education. New York: Harper & Brothers, 1957.
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