Παραπομπή APA
Τρυφονόπουλος, Σ. Ι. (1973). Attitudeas toward formal and adult education: An investigation among Greeks. Athens: National Centre of Social Research.
Παραπομπή Chicago StyleΤρυφονόπουλος, Σπύρος Ι. Attitudeas Toward Formal and Adult Education: An Investigation Among Greeks. Athens: National Centre of Social Research, 1973.
Παραπομπή MLAΤρυφονόπουλος, Σπύρος Ι. Attitudeas Toward Formal and Adult Education: An Investigation Among Greeks. Athens: National Centre of Social Research, 1973.
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