Harrison, R. New Headway. Oxford: OXFORD University Press, 2007- 978-0-19-471661-1.
Harrison, R. New Headway. Oxford: OXFORD University Press, 2007- 978-0-19-471661-1.
Harrison, R. (2007-) New Headway, Oxford: OXFORD University Press 978-0-19-471661-1.
Harrison, R. (2007-). New Headway. Level 1- Academic Skills - Reading, Writing, and Study Skills. Oxford: OXFORD University Press,.
Harrison R. New Headway: Level 1- Academic Skills - Reading, Writing, and Study Skills. Oxford: OXFORD University Press; 2007-. ISBN: 978-0-19-471661-1.