Tohutoro APA (7th ed.)

Swan, M. (1995). Practical english usage (2a. ed.). Oxford University Press.

Tohutoru Kātū Chicago (17th ed.)

Swan, Michael. Practical English Usage. 2a. ed. Oxford: Oxford University Press, 1995.

Tohutoro MLA (9th ed.)

Swan, Michael. Practical English Usage. 2a. ed. Oxford University Press, 1995.