APA

Marsden B., Hopkins A. & Potter J. (2000). Look ahead 1. Harlow: Longman.

Chicago

Marsden B, Hopkins A and Potter J. 2000. Look ahead 1. Harlow: Longman.

Harvard

Marsden B., Hopkins A. and Potter J. (2000). Look ahead 1. Harlow: Longman.

MLA

Marsden B, Hopkins A and Potter J. Look ahead 1. Harlow: Longman. 2000.