Cita APA (7a ed.)
Soars, J., & Soars, L. (1996). Headway. Student's Book. Elementary (1.Edition, 16.impression.). The University Press.
Cita Chicago Style (17a ed.)
Soars, John, y Liz Soars. Headway. Student's Book. Elementary. 1.Edition, 16.impression. Oxford: The University Press, 1996.
Cita MLA (9a ed.)
Soars, John, y Liz Soars. Headway. Student's Book. Elementary. 1.Edition, 16.impression. The University Press, 1996.
Precaución: Estas citas no son 100% exactas.