Gilbert Burnet (1809). “Bishop Burnet's History of His Own Time: From the Restoration of K. Charles II to the Conclusion of the Treaty of Peace at Utrecht, in the Reign of Queen Anne. To which is Prefixed, a Summary Recapitulation of Affairs in Church and State, from King James I. to the Restoration in the Year 1660. Together with the Author's Life and Some Explanatory Notes”, p.235
"Comparing “Heaven is for Real” with “God’s Not Dead” + an interview with “Heaven” writer/director Randall Wallace". Interview with John W. Kennedy, www.beliefnet.com.