APA

Hutchinson T., Ward A., . (1997). Lifelines. Pre-Intermediate. Oxford: Oxford University Press.

Chicago

Hutchinson T, Ward A, . 1997. Lifelines. Pre-Intermediate. Oxford: Oxford University Press.

Harvard

Hutchinson T., Ward A., . (1997). Lifelines. Pre-Intermediate. Oxford: Oxford University Press.

MLA

Hutchinson T, Ward A, . Lifelines. Pre-Intermediate. Oxford: Oxford University Press. 1997.