Cita APA

Hall, M., & Azar, B. S. (2010). Understanding and using english grammar: Teacher's guide (4. ed.). New York: Pearson Longman.

Citación estilo Chicago

Hall, Martha, y Betty Schrampfer Azar. Understanding and Using English Grammar: Teacher's Guide. 4. ed. New York: Pearson Longman, 2010.

Cita MLA

Hall, Martha, y Betty Schrampfer Azar. Understanding and Using English Grammar: Teacher's Guide. 4. ed. New York: Pearson Longman, 2010.