Gaya APA

Swan, Michael. (1997). Practical English Usage -ed 2 (2nd ed.). Oxford: Oxford University Press.

Gaya Chicago

Swan, Michael. Practical English Usage -ed 2. 2nd ed. Oxford: Oxford University Press, 1997. .

Gaya MLA

Swan, Michael. Practical English Usage -ed 2. 2nd ed. Oxford: Oxford University Press, 1997. .

Gaya Turabian

Swan, Michael. Practical English Usage -ed 2. 2nd ed. Oxford: Oxford University Press, 1997. .