APA (7th ed.) Citation

Jones, C., Hopkins, A., & Potter, J. (1994). Look ahead: Classroom course: workbook. Longman.

Chicago Style (17th ed.) Citation

Jones, Carolyn, Andy Hopkins, and Jocelyn Potter. Look Ahead: Classroom Course: Workbook. England: Longman, 1994.

MLA (8th ed.) Citation

Jones, Carolyn, et al. Look Ahead: Classroom Course: Workbook. Longman, 1994.