Levine, Robert: Free ride: How digital parasites are destroying the culture business, and how the culture business can fight back. New York: Doubleday, 2011. ISBN 978-0-385-53376-8. (englanniksi)
Taipale, Sakari: Transformative technologies, spatial changes: Essays on mobile phones and the Internet. Väitöskirja: Jyväskylän yliopisto. Jyväskylä studies in education, psychology and social research 362. Jyväskylä: University of Jyväskylä, 2009. ISBN 978-951-39-3565-8. (englanniksi)
Kotler, Philip & Armstrong, Gary: Principles of marketing. 13th global edition. Upper Saddle River, New Jersey: Pearson Prentice Hall, 2010. ISBN 978-0-13-700669-4. (englanniksi)