توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

), O. (. O. f. E. C. a. D. (1972). Classification of educational systems in OECD member countries: Netherlands Sweden Turkey. OECD.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

), OECD ( Organisation for Economic Co-Operation and Development. Classification of Educational Systems in OECD Member Countries: Netherlands Sweden Turkey. OECD, 1972.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

), OECD ( Organisation for Economic Co-Operation and Development. Classification of Educational Systems in OECD Member Countries: Netherlands Sweden Turkey. OECD, 1972.