APA

Kerr P., Jones C., . (2012). Straightforward. Intermediate. Student's Book. London: Macmillan.

Chicago

Kerr Philip, Jones C, . 2012. Straightforward. Intermediate. Student's Book. London: Macmillan.

Harvard

Kerr P., Jones C., . (2012). Straightforward. Intermediate. Student's Book. London: Macmillan.

MLA

Kerr Philip, Jones C, . Straightforward. Intermediate. Student's Book. London: Macmillan. 2012.