APA (7th ed.) Citation

UNESCO. (1957). Education clearing houses and documentation centres: A preliminary international survey. UNESCO.

Chicago Style (17th ed.) Citation

UNESCO. Education Clearing Houses and Documentation Centres: A Preliminary International Survey. Paris: UNESCO, 1957.

MLA (9th ed.) Citation

UNESCO. Education Clearing Houses and Documentation Centres: A Preliminary International Survey. UNESCO, 1957.

Warning: These citations may not always be 100% accurate.