Witkowska, J. (1998). Strategie rozwoju województw i gmin = Development strategies of voivodships and communities. IGPiK.
Citazione stile Chigago Style (17a edizione)Witkowska, Jadwiga. Strategie Rozwoju Województw I Gmin = Development Strategies of Voivodships and Communities. Warszawa: IGPiK, 1998.
Citatione MLA (9a ed.)Witkowska, Jadwiga. Strategie Rozwoju Województw I Gmin = Development Strategies of Voivodships and Communities. IGPiK, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.