Dr. Robert C. Worstell, Dorothea Brande, Claude M. Bristol, Earl Nightingale, Napoleon Hill (2017). “Mindset StackingTM Inspirational Journal VolumeSS01”, p.44, Lulu.com
Joanna Southcott (1813). “Copies of letters sent to the clergy of Exeter. 1813. A communication sent in a letter to the Reverend Mr. P. in 1797. [1814] A dispute between the woman and the powers of darkness. 2d ed. 1813. The answer of the Lord to the powers of darkness. 2d ed. 1813. A caution and instruction to the sealed. 1807. A warning to the world. [1804] The strange effects of faith. 2d ed. 1801”