APA (7th ed.) Citation

Grolier, E. d. (1962). A study of general categories applicable to classification and coding in documentation. UNESCO.

Chicago Style (17th ed.) Citation

Grolier, Eric de. A Study of General Categories Applicable to Classification and Coding in Documentation. Paris: UNESCO, 1962.

MLA (8th ed.) Citation

Grolier, Eric de. A Study of General Categories Applicable to Classification and Coding in Documentation. UNESCO, 1962.

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