Cita APA

Soars, L., & Soars, J. (2005). New headway: Upper - Intermediate : Student's book (3rd ed.). Oxford: Oxford Univ. Press.

Citación estilo Chicago

Soars, Liz, y John Soars. New Headway: Upper - Intermediate : Student's Book. 3rd ed. Oxford: Oxford Univ. Press, 2005.

Cita MLA

Soars, Liz, y John Soars. New Headway: Upper - Intermediate : Student's Book. 3rd ed. Oxford: Oxford Univ. Press, 2005.