APA

Gairns R., . (2009). Oxford Word Skills intermediate. Oxford: Oxford University Press.

Chicago

Gairns Ruth, . 2009. Oxford Word Skills intermediate. Oxford: Oxford University Press.

Harvard

Gairns R., . (2009). Oxford Word Skills intermediate. Oxford: Oxford University Press.

MLA

Gairns Ruth, . Oxford Word Skills intermediate. Oxford: Oxford University Press. 2009.