Cita APA (7th ed.)

Greenall, S., & Delestrée, A. (1998). Reward: Elementary. Grammar and Vocabulary. Macmillan Heinemann.

Cita Chicago (17th ed.)

Greenall, Simon, i Anne Delestrée. Reward: Elementary. Grammar and Vocabulary. Oxford: Macmillan Heinemann, 1998.

Cita MLA (9th ed.)

Greenall, Simon, i Anne Delestrée. Reward: Elementary. Grammar and Vocabulary. Macmillan Heinemann, 1998.