Gralla, P. (1999). How the internet works. QUe.
Cita Chicago (17th ed.)Gralla, Preston. How the Internet Works. Indianapolis: QUe, 1999.
Cita MLA (9th ed.)Gralla, Preston. How the Internet Works. QUe, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.