Gaya APA

HUTCHINSON, T., Waters, A. (1987). English for spesific purposes : a learning-centred approach/ Tom Hutchinson, Alan Waters . Cambridge: Cambridge University Press.

Gaya MLA

HUTCHINSON, Tom., Waters, Alan. "English for spesific purposes : a learning-centred approach/ Tom Hutchinson, Alan Waters". Cambridge: Cambridge University Press, 1987. Text.