Douglas, D. (2000). Assessing languages for specific purposes. Cambridge, UK: Cambridge University Press.
Dyfyniad Arddull ChicagoDouglas, Dan. Assessing Languages for Specific Purposes. Cambridge, UK: Cambridge University Press, 2000.
Dyfyniad MLADouglas, Dan. Assessing Languages for Specific Purposes. Cambridge, UK: Cambridge University Press, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.