Greenall, S. (1997). Reward: Elementary. Student's book. Macmillan Heinemann.
Cita Chicago Style (17a ed.)Greenall, Simon. Reward: Elementary. Student's Book. Oxford: Macmillan Heinemann, 1997.
Cita MLA (9a ed.)Greenall, Simon. Reward: Elementary. Student's Book. Macmillan Heinemann, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.