Cita APA (7a ed.)

Jones C. Caolyn, Hopkins A. Andy, & Potter J. Joceyn. (1999). Look Ahead 1. Classroom course. Workbook: Workbook (11th ed.). Harlow, Longman, 1999.

Cita Chicago Style (17a ed.)

Jones C. Caolyn, Hopkins A. Andy, y Potter J. Joceyn. Look Ahead 1. Classroom Course. Workbook: Workbook. 11th ed. Harlow, Longman, 1999, 1999.

Cita MLA (9a ed.)

Jones C. Caolyn, et al. Look Ahead 1. Classroom Course. Workbook: Workbook. 11th ed. Harlow, Longman, 1999, 1999.