Grabias, P. (1998). Social policy in the 1990s: Legal regulations and their prospected results. Instytut Pracy i Spraw Socjalnych.
Citazione stile Chigago Style (17a edizione)Grabias, Piotr. Social Policy in the 1990s: Legal Regulations and Their Prospected Results. Warszawa: Instytut Pracy i Spraw Socjalnych, 1998.
Citatione MLA (9a ed.)Grabias, Piotr. Social Policy in the 1990s: Legal Regulations and Their Prospected Results. Instytut Pracy i Spraw Socjalnych, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.