APA (7th ed.) Citation

Unesco. (1962). UNESCO source book for science teaching (Rev. and enl. [i.e. 2d] ed.). Unesco.

Chicago Style (17th ed.) Citation

Unesco. UNESCO Source Book for Science Teaching. Rev. and enl. [i.e. 2d] ed. [Paris]: Unesco, 1962.

MLA (8th ed.) Citation

Unesco. UNESCO Source Book for Science Teaching. Rev. and enl. [i.e. 2d] ed. Unesco, 1962.