APA

Blessed Urban II P., including anonymous eleventh century authors and authors of uncertain date. Followed by comprehensive appendices for the 9th and 10th c - e.g. an unpublished letter of Matilda of Ringelheim Q. a. S., . (1853). Opera omnia B. Urbani II, pontificis Romani. Paris: Migne.

Chicago

Blessed Urban II Pope, including anonymous eleventh century authors and authors of uncertain date. Followed by comprehensive appendices for the 9th and 10th c - e.g. an unpublished letter of Matilda of Ringelheim Queen and Saint, . 1853. Opera omnia B. Urbani II, pontificis Romani. Paris: Migne.

Harvard

Blessed Urban II P., including anonymous eleventh century authors and authors of uncertain date. Followed by comprehensive appendices for the 9th and 10th c - e.g. an unpublished letter of Matilda of Ringelheim Q. a. S., . (1853). Opera omnia B. Urbani II, pontificis Romani. Paris: Migne.

MLA

Blessed Urban II Pope, including anonymous eleventh century authors and authors of uncertain date. Followed by comprehensive appendices for the 9th and 10th c - e.g. an unpublished letter of Matilda of Ringelheim Queen and Saint, . Opera omnia B. Urbani II, pontificis Romani. Paris: Migne. 1853.