刘素云 & 杨磊. (2009). 奥巴马画传: Barack Obama. 春风文艺出版社.
Chicago Style (17th ed.) Citation刘素云 and 杨磊. 奥巴马画传: Barack Obama. 春风文艺出版社, 2009.
MLA (8th ed.) Citation刘素云 and 杨磊. 奥巴马画传: Barack Obama. 春风文艺出版社, 2009.
Warning: These citations may not always be 100% accurate.