APA

Vivier M. d., Hopkins A. & Potter J. (1999). Look Ahead. Classroom course. Intermediate. Harlow: Longman.

Chicago

Vivier M du, Hopkins A and Potter J. 1999. Look Ahead. Classroom course. Intermediate. Harlow: Longman.

Harvard

Vivier M. d., Hopkins A. and Potter J. (1999). Look Ahead. Classroom course. Intermediate. Harlow: Longman.

MLA

Vivier M du, Hopkins A and Potter J. Look Ahead. Classroom course. Intermediate. Harlow: Longman. 1999.