United, N. (2004). World investment report 2004: The shift towards services.
Chicago Edition CitationUnited, Nations. World Investment Report 2004: The Shift Towards Services. New York, United Nations, 2004.
MLA引文United, Nations. World Investment Report 2004: The Shift Towards Services. 2004.
警告:这些引文格式不一定是100%准确.