Collins Cobuild. (2012). Collins Cobuild Key Words for IELTS. TP. HCM: Tổng hợp.
Dyfyniad Arddull ChicagoCollins Cobuild. Collins Cobuild Key Words for IELTS. TP. HCM: Tổng hợp, 2012.
Dyfyniad MLACollins Cobuild. Collins Cobuild Key Words for IELTS. TP. HCM: Tổng hợp, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.