APA aipamena

Swan, M., & Seidl, J. (1986). Basic English usage: Exercises : with key. Oxford: Oxford University Press.

Chicago Style aipamena

Swan, Michael., và Jennifer Seidl. Basic English Usage: Exercises : With Key. Oxford: Oxford University Press, 1986.

MLA aipamena

Swan, Michael., và Jennifer Seidl. Basic English Usage: Exercises : With Key. Oxford: Oxford University Press, 1986.