The Vatican secret archives
MLA
Becchetti, Luca, et al. The Vatican Secret Archives. [Brussels]: VdH Books, 2009
APA, 7th edition
Becchetti, L., Farina, R., Pagano, S. M, & O'Brien, J. A. (2009). The Vatican secret archives. [Brussels]: VdH Books
Chicago, 17th edition
Becchetti, Luca., Raffaele Farina, Sergio M Pagano, and James A O'Brien. The Vatican secret archives. [Brussels]: VdH Books, 2009