Tillitt, B., & Bruder, M. N. (1989). Speaking Naturally: Communication Skills in American English. Cambridge: Cambridge University.
Trích dẫn kiểu ChicagoTillitt, Bruce, và Mary Newton Bruder. Speaking Naturally: Communication Skills in American English. Cambridge: Cambridge University, 1989.
MLA引文Tillitt, Bruce, và Mary Newton Bruder. Speaking Naturally: Communication Skills in American English. Cambridge: Cambridge University, 1989.
警告：這些引文格式不一定是100％准確.