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2 eMarketer, "Which ways is the travel industry headed? Retrieved from http://www.emarketer.com/Article.aspx?1003674. Accessed October 15, 2005"
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5 Erdem, T., "Understanding reference-price shoppers: A within- and cross-category analysis" 38 : 445-457, 2001
6 EyeforTravel, "The ultimate travel search engine. Retrieved from http://www.eyefortravel.com/index.asp?news=45463 Accessed. August 4, 2005"
7 Erickson, G. M., "The role of price in multi-attribute product evaluations" 12 (12): 195-199, 1985
8 Pires, G. D., "The internet, consumer empowerment and marketing strategies" 40 (40): 936-949, 2006
9 Blattberg, R. C., "Sales promotion: concepts, methods and strategies" Prentice Hall 1990
10 Nunnally, J., "Psychometric Theory" McGraw-Hill 1994
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