Organisation for Economic Co-operation and Development. Directorate for Scientific Affairs. (1973). Classification of educational systems in OECD member countries. Organisation for Economic Co-operation and Development.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Organisation for Economic Co-operation and Development. Directorate for Scientific Affairs. Classification of Educational Systems in OECD Member Countries. Paris,: Organisation for Economic Co-operation and Development, 1973.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Organisation for Economic Co-operation and Development. Directorate for Scientific Affairs. Classification of Educational Systems in OECD Member Countries. Organisation for Economic Co-operation and Development, 1973.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.