@misc{Adams_George_Burton_(1851-1925)_Civilization,
 author={Adams, George Burton (1851-1925)},
 address={New York [etc.]},
 howpublished={online},
 publisher={Charles Scribner's Sons},
 language={eng},
 title={Civilization during the middle ages : especially in relation to modern civilization},
 type={książka},
 keywords={Cywilizacja średniowieczna},
}