"Credo". Essay by Arthur C. Clarke (1991), later published in Arthur C. Clarke "Greetings, Carbon-Based Bipeds!: Collected Essays, 1934-1998" (p. 360), 1990.
Smith Wigglesworth (2016). “Smith Wigglesworth on Manifesting the Power of God: Walking in God's Anointing Every Day of the Year”, p.123, Destiny Image Publishers
Charles Brock, Charles Sheeler, National Gallery of Art (U.S.), Art Institute of Chicago, M.H. De Young Memorial Museum (2006). “Charles Sheeler: across media”, University of California Press