Joseph Pintauro. To believe in things. New York: Harper & Row, 1971 

“The graphic space in many of Corita’s works, particularly those from 1967, is also layered with handwritten quotes, which are integrated into typographic components or individual letterforms. The handwriting – Corita’s – became so recognisable in the 1960s that a type company produced it as a type-transfer sheet. The font Corita was used as a typographic blueprint for laying out Bible verses on church posters.”

Julie Ault, Martin Beck. "All you need is love: pictures, words and worship". Eye, no. 35, vol. 9 (2000), p. 48-57