*[https://www.touchstonemag.com/archives/article.php?id=25-02-003-e&readcode=&readtherest=true#therest Saints by Numbers. Will the Religious Inherit the Earth?], Touchstone Magazine
*[https://factsandtrends.net/2017/12/07/wheres-future-christianity/ Where's the future of Christianity?], Facts and trends
*[https://factsandtrends.net/2017/12/07/wheres-future-christianity/ Where's the future of Christianity?], Facts and trends
*[https://www.youtube.com/watch?v=DdPqTbwpziU BBC A History of Christianity - Protestantism: The Evangelical Explosion]
*[https://www.youtube.com/watch?v=DdPqTbwpziU BBC A History of Christianity - Protestantism: The Evangelical Explosion]