Cita APA (7a ed.)

Donker Duyvis, F. (1961). Policy of revision of the Universal Decimal Classification. International Federation For Documentation.

Cita Chicago Style (17a ed.)

Donker Duyvis, Frits. Policy of Revision of the Universal Decimal Classification. The Hague: International Federation For Documentation, 1961.

Cita MLA (9a ed.)

Donker Duyvis, Frits. Policy of Revision of the Universal Decimal Classification. International Federation For Documentation, 1961.