Citazione Stile APA (7a Edizione)

Azar, B. S. (2003). Fundamentals of english grammar: With answer key (3rd ed.). Longman.

Citazione stile Chigago Style (17a edizione)

Azar, Betty Schrampfer. Fundamentals of English Grammar: With Answer Key. 3rd ed. White Plains: Longman, 2003.

Citatione MLA (9a ed.)

Azar, Betty Schrampfer. Fundamentals of English Grammar: With Answer Key. 3rd ed. Longman, 2003.