Ferriss, T. (2008). The 4-hour workweek: Escape 9-5, live anywhere, and join the new rich. Vermilion.
Cita Chicago (17th ed.)Ferriss, Timothy. The 4-hour Workweek: Escape 9-5, Live Anywhere, and Join the New Rich. London: Vermilion, 2008.
Cita MLA (9th ed.)Ferriss, Timothy. The 4-hour Workweek: Escape 9-5, Live Anywhere, and Join the New Rich. Vermilion, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.