Soars, J., & Soars, L. (1989). Headway advanced: Student's Book. New York: Oxford University Press.
Stile di citazione ChicagoSoars, John, e Liz Soars. Headway Advanced: Student's Book. New York: Oxford University Press, 1989.
Citazione MLASoars, John, e Liz Soars. Headway Advanced: Student's Book. New York: Oxford University Press, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.