Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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