American Association of Colleges for Teacher Education. (1968). Teacher education, issues and innovations: Twenty-first yearbook - 1968 Annual meeting. AAACTE.
Παραπομπή σε μορφή Chicago (17η εκδ.)American Association of Colleges for Teacher Education. Teacher Education, Issues and Innovations: Twenty-first Yearbook - 1968 Annual Meeting. Washington, DC: AAACTE, 1968.
Παραπομπή σε μορφή MLA (9th εκδ.)American Association of Colleges for Teacher Education. Teacher Education, Issues and Innovations: Twenty-first Yearbook - 1968 Annual Meeting. AAACTE, 1968.
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