Cita APA (7a ed.)

Swan, M. (2005). Practical English usage (3rd ed., fully revised.). Oxford University.

Cita Chicago Style (17a ed.)

Swan, Michael. Practical English Usage. 3rd ed., fully revised. Oxford: Oxford University, 2005.

Cita MLA (9a ed.)

Swan, Michael. Practical English Usage. 3rd ed., fully revised. Oxford University, 2005.