Cita APA (7th ed.)

Douglas, D. (2000). Assessing language for especific purposes. Cambridge University.

Cita Chicago (17th ed.)

Douglas, Dan. Assessing Language for Especific Purposes. Cambridge: Cambridge University, 2000.

Cita MLA (9th ed.)

Douglas, Dan. Assessing Language for Especific Purposes. Cambridge University, 2000.