Ede, Andrew; Lesley B. Cormack. A history of science in society: from philosophy to utility (en anglès). University of Toronto Press, 2004, pàg. 107. ISBN 1551113325 [Consulta: 17 febrer 2012]. «About 300 copies of the Bible were printed and offered for sale at 30 florins each, which was equal to about three years wages for a cleck.»