gorzelak,grzegorz, & jalowiecki,bohdan. (1993). regional question in europe question regionale en europe. university of warsaw.
Citazione stile Chigago Style (17a edizione)gorzelak,grzegorz, e jalowiecki,bohdan. Regional Question in Europe Question Regionale En Europe. warsaw: university of warsaw, 1993.
Citatione MLA (9a ed.)gorzelak,grzegorz, e jalowiecki,bohdan. Regional Question in Europe Question Regionale En Europe. university of warsaw, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.