APA (7th ed.) Citation

Azar, B. S., Hagen, S. A., & Koch, R. S. (2011). Fundamentals of English grammar: Workbook (Fourth edition.). Longman.

Chicago Style (17th ed.) Citation

Azar, Betty Schrampfer, Stacy A. Hagen, and Rachel Spack Koch. Fundamentals of English Grammar: Workbook. Fourth edition. White Plains, NY: Longman, 2011.

MLA (9th ed.) Citation

Azar, Betty Schrampfer, et al. Fundamentals of English Grammar: Workbook. Fourth edition. Longman, 2011.