Harrison, R. Headway Academic Skills Listening, Speaking, and Study Skills. Oxford: Oxford University Press, 2011 978-0-19-474192-7.
Harrison, R. Headway Academic Skills Listening, Speaking, and Study Skills. Oxford: Oxford University Press, 2011 978-0-19-474192-7.
Harrison, R. (2011) Headway Academic Skills Listening, Speaking, and Study Skills, Oxford: Oxford University Press 978-0-19-474192-7.
Harrison, R. (2011). Headway Academic Skills Listening, Speaking, and Study Skills. Class Audio CDs - Level 3. Oxford: Oxford University Press,.
Harrison R. Headway Academic Skills Listening, Speaking, and Study Skills: Class Audio CDs - Level 3. Oxford: Oxford University Press; 2011. ISBN: 978-0-19-474192-7.
