World Intellectual Property Organization. (1988). Background reading material on intellectual property. World Intellectual Property Organization.
芝加哥风格引文World Intellectual Property Organization. Background Reading Material on Intellectual Property. Geneva, Switzerland: World Intellectual Property Organization, 1988.
MLA引文World Intellectual Property Organization. Background Reading Material on Intellectual Property. World Intellectual Property Organization, 1988.
警告：这些引文格式不一定是100％准确.