APA aipamena

Soars, J., & Soars, L. (1993). Headway Upper-Intermediate: Student"s Book. Oxford: Oxford University Press.

Chicago Style aipamena

Soars, John, và Liz Soars. Headway Upper-Intermediate: Student"s Book. Oxford: Oxford University Press, 1993.

MLA aipamena

Soars, John, và Liz Soars. Headway Upper-Intermediate: Student"s Book. Oxford: Oxford University Press, 1993.