杨冠琼. (2001). 当代美国社会保障制度: Social Security System in the U.S. 法律出版社.
Chicago Style (17th ed.) Citation杨冠琼. 当代美国社会保障制度: Social Security System in the U.S. 法律出版社, 2001.
MLA (8th ed.) Citation杨冠琼. 当代美国社会保障制度: Social Security System in the U.S. 法律出版社, 2001.
Warning: These citations may not always be 100% accurate.