APA

Kenny N., . (1999). Proficincy PassKey. Student's Book. Oxford: Macmillan Publishers Limited.

Chicago

Kenny N, . 1999. Proficincy PassKey. Student's Book. Oxford: Macmillan Publishers Limited.

Harvard

Kenny N., . (1999). Proficincy PassKey. Student's Book. Oxford: Macmillan Publishers Limited.

MLA

Kenny N, . Proficincy PassKey. Student's Book. Oxford: Macmillan Publishers Limited. 1999.