APA

Richards J. C., . (1991). Interchange, English for international communication 2 : Student´s Book. Cambridge: Cambridge University Press.

Chicago

Richards Jack C, . 1991. Interchange, English for international communication 2 : Student´s Book. Cambridge: Cambridge University Press.

Harvard

Richards J. C., . (1991). Interchange, English for international communication 2 : Student´s Book. Cambridge: Cambridge University Press.

MLA

Richards Jack C, . Interchange, English for international communication 2 : Student´s Book. Cambridge: Cambridge University Press. 1991.