APA (7th ed.) Zitazioa

Azar, B. S. (2002). Understanding and using english grammar (3rd ed.). Pearson Education.

Chicago Style (17th ed.) Zitazioa

Azar, Betty Schrampfer. Understanding and Using English Grammar. 3rd ed. New York: Pearson Education, 2002.

MLA (9th ed.) Zitazioa

Azar, Betty Schrampfer. Understanding and Using English Grammar. 3rd ed. Pearson Education, 2002.