APA

Powell M., . (2009). In Company. Intermediate. Oxford: Macmillan.

Chicago

Powell M, . 2009. In Company. Intermediate. Oxford: Macmillan.

Harvard

Powell M., . (2009). In Company. Intermediate. Oxford: Macmillan.

MLA

Powell M, . In Company. Intermediate. Oxford: Macmillan. 2009.