Blass, L. (2007). Quest: Listening and speaking. Boston: McGraw-Hill.
Dyfyniad Arddull ChicagoBlass, Laurie. Quest: Listening and Speaking. Boston: McGraw-Hill, 2007.
Dyfyniad MLABlass, Laurie. Quest: Listening and Speaking. Boston: McGraw-Hill, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.