1. Champlin, D. (1995). Understanding job quality in an era of structural change: What can economics learn from industrial relations? Journal of Economic Issues, 29, 829–841.
2. Costrell, R. (1990). Methodology in the ‘job quality’ debate. Industrial Relation: A Journal of Economics and Society, 29, 94–110.
3. De Grip, A. & Wolbers, M. H. J. (2006). Cross-national differences in job quality among low-skilled young workers in Europe. International Journal of Manpower, 27, 420–433.
4. Glowny Urzad Statystyczny (1992). Rocznik Statystyczny Rzeczpospolitej Polskiej 1992 [Statistical yearbook of the Republic of Poland]. Warszawa: GUS.
5. Glowny Urzad Statystyczny (1994). Rocznik Statystyczny Szkolnictwa 1993/94 [Education statistical yearbook 1993/94 period]. Warszawa: GUS.