Chinese Snowball 4 : Exercise Book A.

MLA

詹爱平 - Zhan Aiping. Chinese Snowball 4 : Exercise Book A. 北京: 北京大学出版社 Peking University Press, 2007.

APA

詹爱平 - Zhan Aiping, 詹. - Zhan Aiping. (2007). Chinese Snowball 4 : Exercise Book A. 北京: 北京大学出版社 Peking University Press.

Chicago

詹爱平 - Zhan Aiping, Chinese Snowball 4: Exercise Book A. 北京: 北京大学出版社 Peking University Press, 2007.