Ray, G. F. (1984). The diffusion of mature technologies. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoRay, George F. The Diffusion of Mature Technologies. Cambridge: Cambridge University Press, 1984.
MLA引文Ray, George F. The Diffusion of Mature Technologies. Cambridge: Cambridge University Press, 1984.
警告：這些引文格式不一定是100％准確.