@misc{Leon_III_(papież_;_750-816)_Leonis,
 author={Leon III (papież ; 750-816)},
 address={Helmestadii},
 howpublished={online},
 publisher={Apud Henningvm Mvllervm},
 language={lat},
 type={książka},
 title={Leonis III Papae Epistolae Ad Carolvm Magnvm Imperatorem : Capitvlare Caroli M. de Villis Suis},
}