(1973). Bibliography of publications issued by Unesco: Or under its auspices: the first twenty-five years. Unesco.
Cita Chicago (17th ed.)Bibliography of Publications Issued by Unesco: Or Under Its Auspices: The First Twenty-five Years. Paris: Unesco, 1973.
Cita MLA (9th ed.)Bibliography of Publications Issued by Unesco: Or Under Its Auspices: The First Twenty-five Years. Unesco, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.