APA

Clarke S., . (2009). In Company. Pre-intermediate. Oxford: Macmillan.

Chicago

Clarke S, . 2009. In Company. Pre-intermediate. Oxford: Macmillan.

Harvard

Clarke S., . (2009). In Company. Pre-intermediate. Oxford: Macmillan.

MLA

Clarke S, . In Company. Pre-intermediate. Oxford: Macmillan. 2009.