1. Act of April 20th, 2004 on Promotion of Employment and Labour Market Institutions, Dziennik Ustaw of 2004 No. 99, item 1001 as amended.
2. Armstrong, M. (2000). Zarządzanie zasobami ludzkimi. Kraków: Oficyna Ekonomiczna - Dom Wydawniczy ABC.
3. Bjornavold, J., & Tissot, P. (2000). Glossary on identification, assessment and validation of qualifications and competences; transparency and transferability of qualifications. working document. Thessaloniki: CEDEFOP.
4. Boyatzis, R. E. (1982). The competent manager: a model for effective performance. New York: Wiley.
5. Bridgstock, R. (2011). Skills for creative industries graduate success. Education and Training, 53(1), 9–26.