Can you help me check the reference list are they correct

1. Balabanis, G. Stables, R. E., & Phillips, H. C. (1997). Market orientation in the top 200 British charity organizations and its impact on their performance. European Journal of Marketing, 31(8), 583-603.
2. Colgate, M., & Smith, J., B. (2007). Customer value creation: a practical framework, Journal of Marketing Theory and Practice, 15(1), 7-23.
3. Lamb, C. W., & Crompton, J. L. (1986). Contrasting marketing and selling orientations in government organisations. Journal of Professional Services Marketing, 1(1), 157-167.
4. Mayfield, T. L., & Crompton, J. L. (1995). The status of the marketing concept among festival organisers. Journal of Travel Research, 33(4), 14-22.
5. Scrivens, E. (1987). The development of a consumer orientation in the british national health service. Health Marketing Quarterly, 4(3/4), 129-142.