William Carey (1792). “An Enquiry Into the Obligations of Christians, to Use Means for the Conversion of the Heathens: In which the Religious State of the Different Nations of the World, the Success of Former Undertakings, and the Practicability of Further Undertakings are Considered,”, p.7
Joseph Sittler, Steven Bouma-Prediger, Peter W. Bakken (2000). “Evocations of Grace: The Writings of Joseph Sittler on Ecology, Theology, and Ethics”, p.202, Wm. B. Eerdmans Publishing