1. Charles II, King of England. “By the King. A Proclamation for Calling In, and Suppressing of Two Books Written by John Milton […].” London, 1660. Early English Books Online, https://www.proquest.com/products-services/databases/eebo.html.
2. Hollandsche Mercurius (Netherlands). December 1660, 163–170. Haarlem, 1661. British Library, London.