Kotler, P., Hayes, T. J., & Bloom, P. N. (2002). Marketing professional services: Forward-thinking strategies for boosting your business, your image, and your profits (2nd ed.). Prentice-Hall.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kotler, Philip, Thomas J. Hayes, και Paul N. Bloom. Marketing Professional Services: Forward-thinking Strategies for Boosting Your Business, Your Image, and Your Profits. 2nd ed. Paramus, NJ: Prentice-Hall, 2002.
Παραπομπή σε μορφή MLA (8th εκδ.)Kotler, Philip, et al. Marketing Professional Services: Forward-thinking Strategies for Boosting Your Business, Your Image, and Your Profits. 2nd ed. Prentice-Hall, 2002.
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