Soars, L., Soars, J., & Griggs, k. (2019). Headway: Intermediate Teacher´s guide. Oxford University Press.
Chicago-čujuhus (17. p.)Soars, Liz, John Soars, juo katherine Griggs. Headway: Intermediate Teacher´s Guide. Oxford: Oxford University Press, 2019.
MLA-čujuhus (9. p.)Soars, Liz, et al. Headway: Intermediate Teacher´s Guide. Oxford University Press, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.