APA

Widdowson H. G., . (1986). Explorations in applied linguistics 2. Oxford: Oxford University Press.

Chicago

Widdowson H G, . 1986. Explorations in applied linguistics 2. Oxford: Oxford University Press.

Harvard

Widdowson H. G., . (1986). Explorations in applied linguistics 2. Oxford: Oxford University Press.

MLA

Widdowson H G, . Explorations in applied linguistics 2. Oxford: Oxford University Press. 1986.