Soars, J. &. L. (1995). Headway: Elementary(student's book). Oxford University Press.
Chicago Style (17th ed.) CitationSoars, John & Liz. Headway: Elementary(student's Book). Oxford, Inglaterra: Oxford University Press, 1995.
MLA (9th ed.) CitationSoars, John & Liz. Headway: Elementary(student's Book). Oxford University Press, 1995.