Cita APA

Swan, M., & Walter, C. (1993). C: The New Cambridge English Course Upper-Interrmediate. Cambridge: Cambridge University.

Citación estilo Chicago

Swan, Michael, y Catherine Walter. C: The New Cambridge English Course Upper-Interrmediate. Cambridge: Cambridge University, 1993.

Cita MLA

Swan, Michael, y Catherine Walter. C: The New Cambridge English Course Upper-Interrmediate. Cambridge: Cambridge University, 1993.