APA

Richards J. C., Richards J. C., . (2003). New interchange. Cambridge: Cambridge University Press.

Chicago

Richards Jack C, Richards Jack C, . 2003. New interchange. Cambridge: Cambridge University Press.

Harvard

Richards J. C., Richards J. C., . (2003). New interchange. Cambridge: Cambridge University Press.

MLA

Richards Jack C, Richards Jack C, . New interchange. Cambridge: Cambridge University Press. 2003.