Harsch, K. (2001). Impact listening: For intermediate &advanced students. Hong Kong: Longman Asia ELT.
Dyfyniad Arddull ChicagoHarsch, Kenton. Impact Listening: For Intermediate &advanced Students. Hong Kong: Longman Asia ELT, 2001.
Dyfyniad MLAHarsch, Kenton. Impact Listening: For Intermediate &advanced Students. Hong Kong: Longman Asia ELT, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.