APA

Pye D., Greenall S., . (1997). Reward. Elementary. Oxford: Heinemann.

Chicago

Pye D, Greenall S, . 1997. Reward. Elementary. Oxford: Heinemann.

Harvard

Pye D., Greenall S., . (1997). Reward. Elementary. Oxford: Heinemann.

MLA

Pye D, Greenall S, . Reward. Elementary. Oxford: Heinemann. 1997.