Cita APA (7a ed.)

British Standards Institution. (1973). Universal decimal classification. British Standards Institution.

Cita Chicago Style (17a ed.)

British Standards Institution. Universal Decimal Classification. London: British Standards Institution, 1973.

Cita MLA (8a ed.)

British Standards Institution. Universal Decimal Classification. British Standards Institution, 1973.

Precaución: Estas citas no son 100% exactas.