New Headway English Course Elementary : Workbook.

MLA

Soars, Liz, and John Soars. New Headway English Course Elementary : Workbook. 9e druk Oxford: University Press, 2003.

APA

Soars, L., & Soars, J. (2003). New Headway English Course Elementary : Workbook. 9e druk Oxford: University Press.

Chicago

Soars, Liz, and John Soars. New Headway English Course Elementary: Workbook. 9e druk Oxford: University Press, 2003.