Lawrence G. Lovasik (1999). “The Hidden Power of Kindness: A Practical Handbook for Souls who Dare to Transform the World, One Deed at a Time”, p.114, Sophia Institute Press
John Calvin (2002). “The Bondage and Liberation of the Will (Texts and Studies in Reformation and Post-Reformation Thought): A Defence of the Orthodox Doctrine of Human Choice against Pighius”, p.61, Baker Books