Cita APA (7a ed.)

Soars, L., & Soars, J. (2004). New Headway English course: Beginner : Student's book.

Cita Chicago Style (17a ed.)

Soars, Liz, y John Soars. New Headway English Course: Beginner : Student's Book. Oxford, 2004.

Cita MLA (9a ed.)

Soars, Liz, y John Soars. New Headway English Course: Beginner : Student's Book. 2004.