HSK 4 Standard Course (上).

MLA

李兵 - Li Bing. Hsk 4 Standard Course (上). 北京: 北京语言大学电子音像出版社 Beijing Language and Culture University Electronic and Audiovisual Press, 2014.

APA

李兵 - Li Bing, 李. - Li Bing. (2014). HSK 4 Standard Course (上). 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

李兵 - Li Bing, HSK 4 Standard Course (上). 北京: 北京语言大学电子音像出版社 Beijing Language and Culture University Electronic and Audiovisual Press, 2014.