Systhema sacramenti poenitentiæ ...

MLA

De Backer, Franciscus, and Joannes Libertus Hennebel. Systhema Sacramenti Poenitentiæ .. .

APA

De Backer, F., & Hennebel, J. Libertus. Systhema sacramenti poenitentiæ .. .

Chicago

De Backer, Franciscus, and Joannes Libertus Hennebel. Systhema Sacramenti Poenitentiæ ... Theses Lovanienses.