Cita APA

Soars, J., & Soars, L. (1993). Headway intermediate student's book & pre-intermediate workbook. Oxford: Oxford University Press.

Chicago Style Citation

Soars, John, i Liz Soars. Headway Intermediate Student's Book & Pre-intermediate Workbook. Oxford: Oxford University Press, 1993.

Cita MLA

Soars, John, i Liz Soars. Headway Intermediate Student's Book & Pre-intermediate Workbook. Oxford: Oxford University Press, 1993.