Ferriss, T. (2008). The 4-hour workweek: Escape 9-5, live anywhere, and join the new rich. Vermilion.
Chicago-viite (17. p.)Ferriss, Timothy. The 4-hour Workweek: Escape 9-5, Live Anywhere, and Join the New Rich. London: Vermilion, 2008.
MLA-viite (9. p.)Ferriss, Timothy. The 4-hour Workweek: Escape 9-5, Live Anywhere, and Join the New Rich. Vermilion, 2008.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.