"Elizabeth Gilbert, ‘Eat, Pray, Love’ Author, On What It Takes To Get Inspired". Interview with Chantal Pierrat, www.huffingtonpost.com. August 11, 2013.
"New Heaven and New Earth Centering On Our Pledge". Reverend Sun Myung Moon's remarks at Grand Ball Room of WMC. New York (as translated by Sang Kil Han), www.unification.net. March 3, 1991.
"Principles of political economy considered with a view to their practical application". Book by Thomas Malthus, Book II, Chapter I, "On The Progress of Wealth", Section X, p. 414, 1836.
Pitirim Aleksandrovich Sorokin (2002). “The Ways and Power of Love: Types, Factors, and Techniques of Moral Transformation”, p.24, Templeton Foundation Press