Cita APA

Soars John. (1996). Headway: Student's book : upper-Intermediate (23. ed.). New York: Oxford University Press.

Citación estilo Chicago

Soars John. Headway: Student's Book : Upper-Intermediate. 23. ed. New York: Oxford University Press, 1996.

Cita MLA

Soars John. Headway: Student's Book : Upper-Intermediate. 23. ed. New York: Oxford University Press, 1996.