Cita APA

Soars, J., & Soars, L. (1987). Headway upper - intermediate: Teacher's book. New York: Oxford University Press.

Chicago Style Citation

Soars, John, i Liz Soars. Headway Upper - Intermediate: Teacher's Book. New York: Oxford University Press, 1987.

Cita MLA

Soars, John, i Liz Soars. Headway Upper - Intermediate: Teacher's Book. New York: Oxford University Press, 1987.