Cita APA

British Standards Institution. (1969). Universal decimal classification (English full ed. (4th international ed.).). British Standards Institution.

Citación estilo Chicago

British Standards Institution. Universal Decimal Classification. English full ed. (4th international ed.). London: British Standards Institution, 1969.

Cita MLA

British Standards Institution. Universal Decimal Classification. English full ed. (4th international ed.). British Standards Institution, 1969.

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