Finding Global Balance. [S.l.]: World Bank Publications. 2005. Consultado em 2 de agosto de 2015
Fortescue 1908, p. 255 "it is all gathered together and still lives in the Holy Apostolic Orthodox Catholic Church of the Seven Councils.". Fortescue, Adrian (1908), The Orthodox Eastern Church 2nd ed. , London: Catholic Truth Society / University of Virginia (publicado em 11 de dezembro de 2008), consultado em 2 de junho de 2014
bbc.co.uk
Stanford, Peter. «Roman Catholic Church». BBC Religions. BBC. Consultado em 1 de fevereiro de 2017
Brien, Joanne O.; Palmer, Martin (2007). The Atlas of Religion. [S.l.]: University of California Press. p. 22. ISBN978-0-520-24917-2. There are over 220 million Orthodox Christians worldwide.
Fortescue 1908, p. 255 "it is all gathered together and still lives in the Holy Apostolic Orthodox Catholic Church of the Seven Councils.". Fortescue, Adrian (1908), The Orthodox Eastern Church 2nd ed. , London: Catholic Truth Society / University of Virginia (publicado em 11 de dezembro de 2008), consultado em 2 de junho de 2014
Encyclopædia Britannica Online, "Eastern Orthodoxy" "Because of the use of the name 'Greek Catholics' by the Eastern churches of the Catholic Church and the historical links of the Orthodox Catholic church with the Eastern Roman Empire and Byzantium (Constantinople), however, the exonyms in American English usage referred to it as the 'Eastern' or 'Greek Orthodox' Church. These terms are sometimes misleading, especially when applied to Russian or Slavic churches and to the Orthodox communities in western Europe and America.".
İçduygu, Ahmet; Toktaş, Şule; Soner, B. Ali (1 de fevereiro de 2008). «The politics of population in a nation-building process: emigration of non-Muslims from Turkey». Ethnic and Racial Studies. 31 (2): 358–389. ISSN0141-9870. doi:10.1080/01419870701491937
Shipman, Andrew (1913). «Ruthenian Rite». Catholic Encyclopedia (em inglês). 13. Nova Iorque: Robert Appleton Company. Consultado em 4 de março de 2018
İçduygu, Ahmet; Toktaş, Şule; Soner, B. Ali (1 de fevereiro de 2008). «The politics of population in a nation-building process: emigration of non-Muslims from Turkey». Ethnic and Racial Studies. 31 (2): 358–389. ISSN0141-9870. doi:10.1080/01419870701491937