Cita APA

World Intellectual Property Organization. (2006). International patent classification: Core level. Geneva, Switzerland: WIPO.

Citación estilo Chicago

World Intellectual Property Organization. International Patent Classification: Core Level. Geneva, Switzerland: WIPO, 2006.

Cita MLA

World Intellectual Property Organization. International Patent Classification: Core Level. Geneva, Switzerland: WIPO, 2006.

Precaución: Estas citas no son 100% exactas.