APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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