APA (7e ed.) Bronvermelding

Thomas, A. (1973). A practical English Grammar- Ex- I to VI. Oxford University Press.

Chicago (17e ed.) Bronvermelding

Thomas, A. A Practical English Grammar- Ex- I to VI. London: Oxford University Press, 1973.

MLA (9e ed.) Bronvermelding

Thomas, A. A Practical English Grammar- Ex- I to VI. Oxford University Press, 1973.