APA (7th ed.) Citation

Azar, B. S. (1990). Understanding and using english grammar: Workbook (2nd edition.). Prentice Hall.

Chicago Style (17th ed.) Citation

Azar, Betty Schrampfer. Understanding and Using English Grammar: Workbook. 2nd edition. Estados Unidos de América: Prentice Hall, 1990.

MLA (9th ed.) Citation

Azar, Betty Schrampfer. Understanding and Using English Grammar: Workbook. 2nd edition. Prentice Hall, 1990.

Warning: These citations may not always be 100% accurate.