Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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