Cita APA (7a ed.)

Soars J. John & Soars L. Liz. (1997). Headway. Pre-intermediate: Workbook. Oxford, Oxford University Press, 1997.

Cita Chicago Style (17a ed.)

Soars J. John y Soars L. Liz. Headway. Pre-intermediate: Workbook. Oxford, Oxford University Press, 1997, 1997.

Cita MLA (9a ed.)

Soars J. John y Soars L. Liz. Headway. Pre-intermediate: Workbook. Oxford, Oxford University Press, 1997, 1997.