APA

Davies P. A., Greenall S., . (2001). All Stars. Upper-Intermediate. Oxford: Oxford University Press.

Chicago

Davies P A, Greenall S, . 2001. All Stars. Upper-Intermediate. Oxford: Oxford University Press.

Harvard

Davies P. A., Greenall S., . (2001). All Stars. Upper-Intermediate. Oxford: Oxford University Press.

MLA

Davies P A, Greenall S, . All Stars. Upper-Intermediate. Oxford: Oxford University Press. 2001.