APA

Hutchinson T., . (1997). Hotline. Pre-intermediate. Oxford: Oxford University Press.

Chicago

Hutchinson T, . 1997. Hotline. Pre-intermediate. Oxford: Oxford University Press.

Harvard

Hutchinson T., . (1997). Hotline. Pre-intermediate. Oxford: Oxford University Press.

MLA

Hutchinson T, . Hotline. Pre-intermediate. Oxford: Oxford University Press. 1997.