Allen, E. D. (1977). Classroom techniques: Foreign languages and English as a second language. New York: Harcourt Brace Jovanovich.
Dyfyniad Arddull ChicagoAllen, Edward David. Classroom Techniques: Foreign Languages and English As a Second Language. New York: Harcourt Brace Jovanovich, 1977.
Dyfyniad MLAAllen, Edward David. Classroom Techniques: Foreign Languages and English As a Second Language. New York: Harcourt Brace Jovanovich, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.