Hedin, H., Hirvensalo, I., & Vaarnas, M. (2011). The handbook of market intelligence: Understand, compete and grow in global markets (Second edition.). John Wiley & Sons.

Hedin, Hans, Irmeli Hirvensalo, and Markko Vaarnas. The Handbook of Market Intelligence: Understand, Compete and Grow in Global Markets. Second edition. West Sussex, England: John Wiley & Sons, 2011.

Hedin, Hans, et al. The Handbook of Market Intelligence: Understand, Compete and Grow in Global Markets. Second edition. John Wiley & Sons, 2011.