Cita APA

Swan, M. 1., & Walter, C. (1990). The Cambridge english course 3. Cambridge: Cambridge University Press.

Citación estilo Chicago

Swan, Michael 1936-, y Catherine Walter. The Cambridge English Course 3. Cambridge: Cambridge University Press, 1990.

Cita MLA

Swan, Michael 1936-, y Catherine Walter. The Cambridge English Course 3. Cambridge: Cambridge University Press, 1990.