APA
Greenstein S., . (1998). Universal service in the digital age: The commercialization and geography of US internet access. Cambridge, MA: NBER.
Chicago
Greenstein Shane, . 1998. Universal service in the digital age: The commercialization and geography of US internet access. Cambridge, MA: NBER.
Harvard
Greenstein S., . (1998). Universal service in the digital age: The commercialization and geography of US internet access. Cambridge, MA: NBER.
MLA
Greenstein Shane, . Universal service in the digital age: The commercialization and geography of US internet access. Cambridge, MA: NBER. 1998.