APA (7e ed.) Bronvermelding

Yule, . G. (2006). Oxford practice grammar advanced with answer. Oxford University Press.

Chicago (17e ed.) Bronvermelding

Yule, George. Oxford Practice Grammar Advanced with Answer. Inglaterra: Oxford University Press, 2006.

MLA (9e ed.) Bronvermelding

Yule, George. Oxford Practice Grammar Advanced with Answer. Oxford University Press, 2006.