1. Brooks, S. M., Wiley, J. W., & Hause, E. L. (2006). Using employee and customer perspectives to improve organizational performance.
2. In L. Fogli (Ed.), Customer service delivery: Research and best practices (pp. 52 - 82). San Francisco, CA: Jossey-Bass.
3. Čižo, E., Awan, R.A., Ali, R., Esau, N.A. (2022). Impact of employee attitude on their pro-social behavior: a case study. Entrepreneurship and Sustainability Issues, 9(4), 416-426. http://doi.org/10.9770/jesi2022.9.4(22)
4. Dawid-Sawicka, M. Stelmach, E. (2023). 13 wzorców dobrej komunikacji i relacji. Analiza transakcyjna w praktyce [13 patterns of good communication and relationships. Transactional analysis in practice]. Wolters Kluwer Polska, Warszawa.
5. Elson, C.M. & Ferrere, C.K. (2012). Executive Superstars, Peer Groups and Over-Compensation- Cause, Effect and Solution, Available at SSRN 2125979, 2012 - works.bepress.com [accessed 18 February 2023].