Sources - Why and where do we travel?

Schmoll, G. A. (1977). Tourism Promotion: marketing background, promotion techniques and promotion planning methods. Tourism International Press.

Wall, G., & Mathieson, A. (2006). Tourism: changes, impacts, and opportunities (2. ed.). Harlow, Eng. ; New York: Pearson Prentice Hall.

Wang, Y.-S. (2009). The impact of crisis events and macroeconomic activity on Taiwan's international inbound tourism demand. Tourism Management, 30(1), 75-82.