APA引文
World Health Organization & ebrary, Inc. (2009). International travel and health: Situation as on 1 January 2009. World Health Organization.
Chicago Style (17th ed.) Citation
World Health Organization and Inc ebrary. International Travel and Health: Situation as on 1 January 2009. Geneva: World Health Organization, 2009.
MLA引文
World Health Organization and Inc ebrary. International Travel and Health: Situation as on 1 January 2009. World Health Organization, 2009.
警告：這些引文格式不一定是100％准確.