Leu, Urs B. 2010. „John Landis Ruth, The Earth Is the Lord’s, A Narrative History of the Lancaster Mennonite Conference, Scottdale PA/Waterloo Ont. 2001 (Studies in Anabaptist and Mennonite History, No. 39)“. Zwingliana 32 ( ):166-67. https://zwingliana.ch/index.php/zwa/article/view/129.