Cita APA

Swan, M. 1., & Swan, M. 1. (2005). Practical English usage (3. edition.). Oxford: Oxford University Press.

Citación estilo Chicago

Swan, Michael 1936-, y Michael 1936- Swan. Practical English Usage. 3. edition. Oxford: Oxford University Press, 2005.

Cita MLA

Swan, Michael 1936-, y Michael 1936- Swan. Practical English Usage. 3. edition. Oxford: Oxford University Press, 2005.