Paulston, C. B., & Dykstra, G. O. (1973). Controlled composition in English as a second language. Regents Pub. Co..
Dyfyniad Arddull ChicagoPaulston, Christina Bratt, and Gerald O. Dykstra. Controlled Composition in English as a Second Language. New York: Regents Pub. Co., 1973.
Dyfyniad MLAPaulston, Christina Bratt, and Gerald O. Dykstra. Controlled Composition in English as a Second Language. Regents Pub. Co., 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.