APA

McMahon A., . (2006). Attitude: Workbook 2. México: Macmillan.

Chicago

McMahon Andrea, . 2006. Attitude: Workbook 2. México: Macmillan.

Harvard

McMahon A., . (2006). Attitude: Workbook 2. México: Macmillan.

MLA

McMahon Andrea, . Attitude: Workbook 2. México: Macmillan. 2006.