APA
Hackman S., . (2005). Checkpoint: English-1. London: Hodder Murray.
Chicago
Hackman Sue, . 2005. Checkpoint: English-1. London: Hodder Murray.
Harvard
Hackman S., . (2005). Checkpoint: English-1. London: Hodder Murray.
MLA
Hackman Sue, . Checkpoint: English-1. London: Hodder Murray. 2005.