@misc{Costerus_Franciscus_Libellus,
 author={Costerus, Franciscus},
 howpublished={online},
 publisher={Officina Christophori Plantini Architypographi Regij},
 language={lat},
 title={Libellus Sodalitatis, hoc est Chistianarum institutionum libri quinque in gratiam sodalitatis B[eatae] Virginis Mariae auctore R[everendi] P[atri] Francisco Costero, doctore theologo Societatis Iesu},
 type={starodruk},
 keywords={Franciscus Costerus, Kościół katolicki, Bractwa religijne, Sodalicja Mariańska},
}