HSK 4 Standard Course Workbook : Workbook (上).

MLA

李兵. Hsk 4 Standard Course Workbook : Workbook (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, 2015.

APA

李兵, 李. (2015). HSK 4 Standard Course Workbook : Workbook (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, HSK 4 Standard Course Workbook: Workbook (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, 2015.