Azar, B. S., & Hagen, S. A. (2010). Understanding and using English grammar: Chartbook A reference Garammar (Fourth edition.). Longman.
Chicago Style (17. basım) AtıfAzar, Betty Schrampfer, ve Stacy A. Hagen. Understanding and Using English Grammar: Chartbook A Reference Garammar. Fourth edition. White Plains, NY: Longman, 2010.
MLA (9th ed.) AtıfAzar, Betty Schrampfer, ve Stacy A. Hagen. Understanding and Using English Grammar: Chartbook A Reference Garammar. Fourth edition. Longman, 2010.
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