Cita APA

Azar, B. S. 1. (1999). Understanding and using English grammar (3. edition.). Upper Saddle River, N.J.: Longman.

Citación estilo Chicago

Azar, Betty Schrampfer 1941-. Understanding and Using English Grammar. 3. edition. Upper Saddle River, N.J.: Longman, 1999.

Cita MLA

Azar, Betty Schrampfer 1941-. Understanding and Using English Grammar. 3. edition. Upper Saddle River, N.J.: Longman, 1999.