Gaya APA

Dudley-Evans, T., John, M, J, S. (2009). Developments in English for Specific Purposes (Cet.11). New York: Cambridge university press.

Gaya MLA

Dudley-Evans, Tony., John, Maggie, Jo, St. "Developments in English for Specific Purposes". Cet.11 New York: Cambridge university press, 2009. Text.