Cita APA

Swan, M. (2005). Practical english usage (3ª ed.). Oxford University.

Citación estilo Chicago

Swan, Michael. Practical English Usage. 3ª ed. Oxford: Oxford University, 2005.

Cita MLA

Swan, Michael. Practical English Usage. 3ª ed. Oxford University, 2005.

Warning: These citations may not always be 100% accurate.