APA-referens (7:e uppl.)

Treacy, W. P. (1889). Old Catholic Maryland and its early Jesuit missionaries.

Chicago-referens (17:e uppl.)

Treacy, William P. Old Catholic Maryland and Its Early Jesuit Missionaries. Swedesboro, N. J, 1889.

MLA-referens (8:e uppl.)

Treacy, William P. Old Catholic Maryland and Its Early Jesuit Missionaries. 1889.