Pei, M. (1949). The story of language. Mentor Books.
Chicago-Zitierstil (17. Ausg.)Pei, Mario. The Story of Language. New York: Mentor Books, 1949.
MLA-Zitierstil (8. Ausg.)Pei, Mario. The Story of Language. Mentor Books, 1949.
警告：这些引文格式不一定是100％准确.