Proficiency masterclass: Student’s book.
Trích dẫn kiểu ChicagoProficiency Masterclass: Student’s Book.
MLA引文Proficiency Masterclass: Student’s Book.
警告：这些引文格式不一定是100％准确.
APA引文
Proficiency masterclass: Student’s book.
Trích dẫn kiểu ChicagoProficiency Masterclass: Student’s Book.
MLA引文Proficiency Masterclass: Student’s Book.