Melin, I. (1997). Improved migration statistics: An evolution.
Chicago-Zitierstil (17. Ausg.)Melin, Ingrid. Improved Migration Statistics: An Evolution. Luxembourg, 1997.
MLA-Zitierstil (8. Ausg.)Melin, Ingrid. Improved Migration Statistics: An Evolution. 1997.
警告：这些引文格式不一定是100％准确.