@misc{Alphonsus_de_Spina_(_–1469)_Fortalitium,
 author={Alphonsus de Spina ( –1469)},
 address={Nürnberg},
 howpublished={online},
 publisher={Koberger, Anton (ca 1440-1513). Druk.},
 language={lat},
 title={Fortalitium fidei.},
 keywords={15 w., Kolekcje Piastowskie, inkunabuły, ekslibris},
}