Παραπομπή APA

Varian,Hal R, & Farrell,Joseph. (2004). The economics of information technology: An introduction. Cambridge University Press.

Παραπομπή Chicago Style

Varian,Hal R, και Farrell,Joseph. The Economics of Information Technology: An Introduction. New York: Cambridge University Press, 2004.

Παραπομπή MLA

Varian,Hal R, και Farrell,Joseph. The Economics of Information Technology: An Introduction. Cambridge University Press, 2004.