Τρυφωνόπουλος, Σ. Ι. (1973). Attitudes toward formal and adult education: An investigation among greeks. Athens: National Centre of Social Research.
استشهاد بنمط شيكاغوΤρυφωνόπουλος, Σπύρος Ι. Attitudes Toward Formal and Adult Education: An Investigation Among Greeks. Athens: National Centre of Social Research, 1973.
MLA استشهادΤρυφωνόπουλος, Σπύρος Ι. Attitudes Toward Formal and Adult Education: An Investigation Among Greeks. Athens: National Centre of Social Research, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.