Dellar, H., & Walkley, A. (2010). Pre-Intermediate Outcomes: Student's Book. Heinle, Cengage Learning EMEA.
Dyfyniad Arddull ChicagoDellar, Hugh, and Andrew Walkley. Pre-Intermediate Outcomes: Student's Book. Hampshire, United Kingdom: Heinle, Cengage Learning EMEA, 2010.
Dyfyniad MLADellar, Hugh, and Andrew Walkley. Pre-Intermediate Outcomes: Student's Book. Heinle, Cengage Learning EMEA, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.