APA-referens (7:e uppl.)

Butler, C. (1930). The Vatican Council. Longmans, Green, and Co..

Chicago-referens (17:e uppl.)

Butler, Cuthbert. The Vatican Council. London ; New York ; Toronto: Longmans, Green, and Co., 1930.

MLA-referens (8:e uppl.)

Butler, Cuthbert. The Vatican Council. Longmans, Green, and Co., 1930.