@misc{Guilelmus_Peraldus_(1200?-1271)_Summa,
 author={Guilelmus Peraldus (1200?-1271)},
 howpublished={online},
 publisher={Basel},
 publisher={Ruppel Berth},
 language={lat},
 type={inkunabuł},
 title={Summa de virtutibus et vitiis},
 keywords={Incunabula -- Poland -- Bydgoszcz -- Catalogs, Early printed books -- 15th century},
}