Johnson ,Spencer. (1999). Who Moved My Cheese. Vermilion.
Cita Chicago (17th ed.)Johnson ,Spencer. Who Moved My Cheese. London: Vermilion, 1999.
Cita MLA (9th ed.)Johnson ,Spencer. Who Moved My Cheese. Vermilion, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.