Gaya APA

Richards, J, C., Hull, J. (1991). Interchange : english for international communication/ Jack C. Richards, Jonathan Hull, Susan Proctor . Cambridge: Cambridge University Press.

Gaya MLA

Richards, Jack, C.., Hull, Jonathan. "Interchange : english for international communication/ Jack C. Richards, Jonathan Hull, Susan Proctor". Cambridge: Cambridge University Press, 1991. Text.