Cita APA (7a ed.)

Soars, L., & Soars, J. (2003). New Headway English course: Pre-intermediate : student's book.

Cita Chicago Style (17a ed.)

Soars, Liz, y John Soars. New Headway English Course: Pre-intermediate : Student's Book. Oxford, 2003.

Cita MLA (9a ed.)

Soars, Liz, y John Soars. New Headway English Course: Pre-intermediate : Student's Book. 2003.