Cita APA (7th ed.)

Soars, L., Soars John, & Merifield, S. (2019). Headway: Upper Intermadiate, Teacher's Guide (quinta edición.). Oxford University Press.

Cita Chicago (17th ed.)

Soars, Liz, Soars John, i Sue Merifield. Headway: Upper Intermadiate, Teacher's Guide. quinta edición. Oxford, United Kingdom: Oxford University Press, 2019.

Cita MLA (9th ed.)

Soars, Liz, et al. Headway: Upper Intermadiate, Teacher's Guide. quinta edición. Oxford University Press, 2019.