Swan, M. (1998). Practical english eusage (2a ed.). Oxford University Press.
Chicago Style (17th ed.) CitationSwan, Michael. Practical English Eusage. 2a ed. Buenos Aires, Argentina: Oxford University Press, 1998.
MLA (9th ed.) CitationSwan, Michael. Practical English Eusage. 2a ed. Oxford University Press, 1998.