Eastern Orthodox Church (english nyelven). BBC, 2008. június 11. (Hozzáférés: 2021. június 27.) „The doctrine of the Christian Church was established over the centuries at Councils dating from as early as 325CE where the leaders from all the Christian communities were represented.”
dioceseoflansing.org
What do Catholics believe? (english nyelven). Roman Catholic Diocese of Lansing. (Hozzáférés: 2021. június 29.) „We are the original Christian Church, which began when Jesus himself when he said to the Apostle Peter, “You are the rock on which I will build my church. The gates of hell will not prevail against it.” Every pope since then has been part of an unbroken line of succession since Peter, the first pope.”
