Cita APA (7a ed.)
Bolton, D., Oxender, C., & Peterson, L. (1989). Oxford intensive english courses. OK workbook 1. Oxford university press.
Cita Chicago Style (17a ed.)
Bolton, David, Clive Oxender, y Len Peterson. Oxford Intensive English Courses. OK Workbook 1. Oxford: Oxford university press, 1989.
Cita MLA (9a ed.)
Bolton, David, et al. Oxford Intensive English Courses. OK Workbook 1. Oxford university press, 1989.
Precaución: Estas citas no son 100% exactas.