Unesco. (1949). A handbook for the improvement of textbooks and teaching materials as aids to international understanding. UNESCO.
Chicago Style (17th ed.) CitationUnesco. A Handbook for the Improvement of Textbooks and Teaching Materials as Aids to International Understanding. Paris: UNESCO, 1949.
MLA引文Unesco. A Handbook for the Improvement of Textbooks and Teaching Materials as Aids to International Understanding. UNESCO, 1949.
警告:這些引文格式不一定是100%准確.