Citazione Stile APA (7a Edizione)

Azar, B. S. (2002). Understanding and using English grammar (3rd ed.). Prentice Hall Regents.

Citazione stile Chigago Style (17a edizione)

Azar, Betty Schrampfer. Understanding and Using English Grammar. 3rd ed. Upper Saddle River, NJ: Prentice Hall Regents, 2002.

Citatione MLA (8a ed.)

Azar, Betty Schrampfer. Understanding and Using English Grammar. 3rd ed. Prentice Hall Regents, 2002.