APA

Grenall S., . (1998). Reward. InterN@tive. Elementary. London: Macmillan Publishing Limited.

Chicago

Grenall S, . 1998. Reward. InterN@tive. Elementary. London: Macmillan Publishing Limited.

Harvard

Grenall S., . (1998). Reward. InterN@tive. Elementary. London: Macmillan Publishing Limited.

MLA

Grenall S, . Reward. InterN@tive. Elementary. London: Macmillan Publishing Limited. 1998.