Catholic Church. Pope (2013- : Francis). Laudato si' (Corporate Name)

The Holy See website, viewed July 8, 2015: (Laudato si'; 24 May 2015)

National Catholic reporter website, viewed July 8, 2015 Vatican confirms title of environmental encyclical (Laudato si'; title is a quotation from a popular prayer of St. Francis of Assisi written about 1224; the prayer was written in Umbrian instead of Latin)

Catholic news service, viewed July 8, 2015 Pope's encyclical to have medieval Italian title, not Latin (Laudato si'; the encyclical will not be release with a Latin title; earlier reporters had used the modern "sii" for the phrase; the official spelling is the same as that in the prayer by St. Francis)

International business times, viewed July 8, 2015 Pope Francis climate change encyclical (written in "plain, everyday Italian" instead of Latin; title is from a work of St. Francis of Assisi written about 1224 in Umbrian)