@Book{248715860,
title="Principles and ideology of government",
series="Quaestiones medii aevi novae 1",
year="1996",
publisher="Wydawn. DiG",
address="Warszawa",
note="Instytut Historyczny Uniwersytetu Warszawskiego. [Ed. board Marek Derwich ...]",
note="Beitr. teilw. dt., teilw. engl",
language="German"
}