Citação norma APA
Soars, J., & Soars, L. (1993). Headway. Teacher's Book: Advanced. Includes Test Booklet (6.impression.). Oxford University Press.
Citação norma Chicago
Soars, John, and Liz Soars. Headway. Teacher's Book: Advanced. Includes Test Booklet. 6.impression. Oxford: Oxford University Press, 1993.
Citação norma MLA
Soars, John, and Liz Soars. Headway. Teacher's Book: Advanced. Includes Test Booklet. 6.impression. Oxford University Press, 1993.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.