Cita APA

Swan, M., & Walter, C. (2011). Oxford english grammar course: Basic : a grammar practice book for elementary to pre-intermediate students of english. Oxford: Oxford University Press.

Citación estilo Chicago

Swan, Michael,, y Catherine Walter. Oxford English Grammar Course: Basic : A Grammar Practice Book for Elementary to Pre-intermediate Students of English. Oxford: Oxford University Press, 2011.

Cita MLA

Swan, Michael,, y Catherine Walter. Oxford English Grammar Course: Basic : A Grammar Practice Book for Elementary to Pre-intermediate Students of English. Oxford: Oxford University Press, 2011.