APA
Rivers W. M., . (1988). Communicating naturally in a second language : theory and practice in language teaching. Cambridge: Cambridge Univ. Press.
Chicago
Rivers Wilga M, . 1988. Communicating naturally in a second language : theory and practice in language teaching. Cambridge: Cambridge Univ. Press.
Harvard
Rivers W. M., . (1988). Communicating naturally in a second language : theory and practice in language teaching. Cambridge: Cambridge Univ. Press.
MLA
Rivers Wilga M, . Communicating naturally in a second language : theory and practice in language teaching. Cambridge: Cambridge Univ. Press. 1988.