Catholic Church. Pope (1775-1799 : Pius VI). (1800). Collectio brevium atque instructionum. Typis Rev. Camerae Apostolicae.
Chicago-viite (17. p.)Catholic Church. Pope (1775-1799 : Pius VI). Collectio Brevium Atque Instructionum. Romae: Typis Rev. Camerae Apostolicae, 1800.
MLA-viite (8. p.)Catholic Church. Pope (1775-1799 : Pius VI). Collectio Brevium Atque Instructionum. Typis Rev. Camerae Apostolicae, 1800.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.