Cita APA (7a ed.)

Soars, L., & Soars, J. New Headway: Eleemtary student´s book Part B unit 7- 12 (4a ed.). University Oxford.

Cita Chicago Style (17a ed.)

Soars, Liz, y John Soars. New Headway: Eleemtary Student´s Book Part B Unit 7- 12. 4a ed. Oxford: University Oxford.

Cita MLA (8a ed.)

Soars, Liz, y John Soars. New Headway: Eleemtary Student´s Book Part B Unit 7- 12. 4a ed. University Oxford.