APA引文

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

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.