Cita APA (7a ed.)
Azar, B. S. (1999). Answer key: Understanding and using english grammar (3a ed.). Longman.
Cita Chicago Style (17a ed.)
Azar, Betty Schrampfer. Answer Key: Understanding and Using English Grammar. 3a ed. New York: Longman, 1999.
Cita MLA (9a ed.)
Azar, Betty Schrampfer. Answer Key: Understanding and Using English Grammar. 3a ed. Longman, 1999.
Precaución: Estas citas no son 100% exactas.