United Nations Conference on Trade and Development. (1989). Trade in services: Sectoral issues. United Nations.
Chicago-Zitierstil (17. Ausg.)United Nations Conference on Trade and Development. Trade in Services: Sectoral Issues. New York: United Nations, 1989.
MLA-Zitierstil (8. Ausg.)United Nations Conference on Trade and Development. Trade in Services: Sectoral Issues. United Nations, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.