@misc{Alphonsus_de_Spina_(_-1469)_Fortalitium,
 author={Alphonsus de Spina ( -1469)},
 howpublished={online},
 publisher={Anton Koberger},
 language={lat},
 type={inkunabuł},
 title={Fortalitium fidei},
 keywords={apologetyka, średniowiecze},
}