@misc{Sykstus_IV_(papież_;_1414-1484)_Bulla, author={Sykstus IV (papież ; 1414-1484)}, howpublished={online}, publisher={[Typographus Sixti IV Bullae]}, language={lat}, title={Bulla de reformatione Confraternitatis Hospitalis s. Spiritus}, type={inkunabuł}, }