Não informado. (1961). The Humanist Educator. American Personnel and Guidance Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. The Humanist Educator. Falls Church, Va: American Personnel and Guidance Association, 1961.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. The Humanist Educator. American Personnel and Guidance Association, 1961.
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