Soars, J., & Soars, L. (1987). Headway: Student's book. Upper-intemediate. Oxford University Press.
Chicago-čujuhus (17. p.)Soars, John, juo Liz Soars. Headway: Student's Book. Upper-intemediate. Oxford: Oxford University Press, 1987.
MLA-čujuhus (9. p.)Soars, John, juo Liz Soars. Headway: Student's Book. Upper-intemediate. Oxford University Press, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.