Cita APA

Betty Schrampfer Azar,, Rachel Spack Koch, Susan Jamieson, Barbara Andrews, & Jeanie Francis. (1990). Understanding and Using English grammar: Workbook. USA: Prentice hall regents.

Chicago Style Citation

Betty Schrampfer Azar,, Rachel Spack Koch, Susan Jamieson, Barbara Andrews, i Jeanie Francis. Understanding and Using English Grammar: Workbook. USA: Prentice hall regents, 1990.

Cita MLA

Betty Schrampfer Azar,, et al. Understanding and Using English Grammar: Workbook. USA: Prentice hall regents, 1990.