APA ציטוט

(2006).  Focus on grammar 4. An integrated skills approach.  Pearson Longman.

Trích dẫn kiểu Chicago

 Focus On Grammar 4. An Integrated Skills Approach.  Pearson Longman, 2006.

ציטוט MLA

 Focus On Grammar 4. An Integrated Skills Approach.  Pearson Longman, 2006.