Croil, J. (1883). The missionary problem: Containing a history of Protestant missions in some of the principal fields of missionary enterprise, together with a historical and statistical account of the rise and progress of missionary societies in the nineteenth century. William Briggs.
Παραπομπή σε μορφή Chicago (17η εκδ.)Croil, James. The Missionary Problem: Containing a History of Protestant Missions in Some of the Principal Fields of Missionary Enterprise, Together with a Historical and Statistical Account of the Rise and Progress of Missionary Societies in the Nineteenth Century. Toronto Montréal Halifax, N.S: William Briggs, 1883.
Παραπομπή σε μορφή MLA (8th εκδ.)Croil, James. The Missionary Problem: Containing a History of Protestant Missions in Some of the Principal Fields of Missionary Enterprise, Together with a Historical and Statistical Account of the Rise and Progress of Missionary Societies in the Nineteenth Century. William Briggs, 1883.