Bishops, C. C. i. B. (1916). Letter of the Bishops of Belgium to the Bishops of Germany Bavaria and Austria-Hungary. New York.
Chicago-referens (17:e uppl.)Bishops, Catholic Church in Belgium. Letter of the Bishops of Belgium to the Bishops of Germany Bavaria and Austria-Hungary. New York, 1916.
MLA-referens (8:e uppl.)Bishops, Catholic Church in Belgium. Letter of the Bishops of Belgium to the Bishops of Germany Bavaria and Austria-Hungary. New York, 1916.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.