APA (7th ed.) Citation

International Bureau of Education. (1982). Directory of educational documentation and information services (4th ed.). Unesco.

Chicago Style (17th ed.) Citation

International Bureau of Education. Directory of Educational Documentation and Information Services. 4th ed. Paris: Unesco, 1982.

MLA (9th ed.) Citation

International Bureau of Education. Directory of Educational Documentation and Information Services. 4th ed. Unesco, 1982.