Cita APA (7a ed.)

Black M. Michael & Capel A. Annette. (2006). Objective IELTS. Advanced. Workbook with Answers. Cambridge, Cambridge University Press, 2006.

Cita Chicago Style (17a ed.)

Black M. Michael y Capel A. Annette. Objective IELTS. Advanced. Workbook with Answers. Cambridge, Cambridge University Press, 2006, 2006.

Cita MLA (9a ed.)

Black M. Michael y Capel A. Annette. Objective IELTS. Advanced. Workbook with Answers. Cambridge, Cambridge University Press, 2006, 2006.