APA

Aspinall P., Bethell G., . (1997). Language in use. Pre-Intermediate. Cambridge: Cambridge University Press.

Chicago

Aspinall P, Bethell G, . 1997. Language in use. Pre-Intermediate. Cambridge: Cambridge University Press.

Harvard

Aspinall P., Bethell G., . (1997). Language in use. Pre-Intermediate. Cambridge: Cambridge University Press.

MLA

Aspinall P, Bethell G, . Language in use. Pre-Intermediate. Cambridge: Cambridge University Press. 1997.