Cita APA (7th ed.)

Greenall, S. (1997). Reward: Elementary. Student's book. Macmillan Heinemann.

Cita Chicago (17th ed.)

Greenall, Simon. Reward: Elementary. Student's Book. Oxford: Macmillan Heinemann, 1997.

Cita MLA (9th ed.)

Greenall, Simon. Reward: Elementary. Student's Book. Macmillan Heinemann, 1997.