World Student Christian Federation, John Raleigh Mott (1898). “The World's Student Christian Federation: Origin, Objects and Significance of the Federation; the Convention at Northfield and Williamstown; Some Achievements of the First Two Years”
Charles Hodge (1855). “What is Presbyterianism?: An Address Delivered Before the Presbyterian Historical Society at Their Anniversary Meeting in Philadelphia, on Tuesday Evening, May 1, 1855”, p.27