Ray, G. F. (1984). The diffusion of mature technologies. Cambridge: Cambridge University Press.
Chicago Style aipamenaRay, George F. The Diffusion of Mature Technologies. Cambridge: Cambridge University Press, 1984.
MLA aipamenaRay, George F. The Diffusion of Mature Technologies. Cambridge: Cambridge University Press, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.