Hutchinson, T. (1991). Hotline: Starter. Student's book. Oxford University Press.
Cita Chicago (17th ed.)Hutchinson, Tom. Hotline: Starter. Student's Book. Oxford: Oxford University Press, 1991.
Cita MLA (9th ed.)Hutchinson, Tom. Hotline: Starter. Student's Book. Oxford University Press, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.