[51] Christensen, C. M., Raynor, M. E. The Innovator's Solution[M]. Boston: Harvard Business School Press, 2003.
[52] Churchill, G. A., Peter, J. P. Research Design Effects on the Reliability of Rating Scales: A meta-analysis[J]. Journal of Marketing Research, 1984, 21: 360-375.
[53] Clark, B. H. Marketing performance measures: History and interrelationships[J]. Journal of Marketing Management, 1999, 15: 711-732.