Gude, K., Duckworth, M., & Halliwell, H. (2007). Top score: Student's book 3. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoGude, Kathy, Michael Duckworth, và Helen Halliwell. Top Score: Student's Book 3. Oxford: Oxford University Press, 2007.
Dyfyniad MLAGude, Kathy, Michael Duckworth, và Helen Halliwell. Top Score: Student's Book 3. Oxford: Oxford University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.