Azar, B. Understanding an using English Grammar (Second edition.). Newjersey: NXB Prentice Hall Regents.
Trích dẫn kiểu ChicagoAzar, B.S. Understanding an Using English Grammar. Second edition. Newjersey: NXB Prentice Hall Regents.
MLA Trích dẫnAzar, B.S. Understanding an Using English Grammar. Second edition. Newjersey: NXB Prentice Hall Regents.
Warning: These citations may not always be 100% accurate.