Quamquam pluries. [Encycliek 15 augustus 1889].

MLA

Leo. Quamquam Pluries. [encycliek 15 Augustus 1889]. Fribourg: St-Paul, 1958.

APA

Leo, L. (1958). Quamquam pluries. [Encycliek 15 augustus 1889]. Fribourg: St-Paul.

Chicago

Leo Quamquam Pluries. [encycliek 15 Augustus 1889]. Fribourg: St-Paul, 1958.