Easy Steps to Chinese 4 : Textbook.

MLA

马亚敏 - Ma Yamin, and 李欣颖 - Li Xinying. Easy Steps to Chinese 4 : Textbook. Beijing 北京: 北京语言大学电子音像出版社 Beijing Language and Culture University Electronic and Audiovisual Press, 2006.

APA

马亚敏 - Ma Yamin, 马. - Ma Yamin, & 李欣颖 - Li Xinying, 李. - Li Xinying. (2006). Easy Steps to Chinese 4 : Textbook. Beijing 北京: 北京语言大学电子音像出版社 Beijing Language and Culture University Electronic and Audiovisual Press.

Chicago

马亚敏 - Ma Yamin, and 李欣颖 - Li Xinying. Easy Steps to Chinese 4: Textbook. Beijing 北京: 北京语言大学电子音像出版社 Beijing Language and Culture University Electronic and Audiovisual Press, 2006.