APA-viite (7. p.)

Soars, L., Soars, J., & Griggs, k. (2019). Headway: Intermediate Teacher´s guide. Oxford University Press.

Chicago-viite (17. p.)

Soars, Liz, John Soars, ja katherine Griggs. Headway: Intermediate Teacher´s Guide. Oxford: Oxford University Press, 2019.

MLA-viite (9. p.)

Soars, Liz, et al. Headway: Intermediate Teacher´s Guide. Oxford University Press, 2019.