Tillitt, B., & Bruder, M. N. (1985). Speaking naturally: Communication skills in American English. Cambridge University Press.

Tillitt, Bruce, and Mary Newton Bruder. Speaking Naturally: Communication Skills in American English. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1985.

Tillitt, Bruce, and Mary Newton Bruder. Speaking Naturally: Communication Skills in American English. Cambridge University Press, 1985.