Earl Nightingale Quotes about Positive
Dr. Robert C. Worstell, Dorothea Brande, Claude M. Bristol, Earl Nightingale, Napoleon Hill (2017). “Mindset StackingTM Inspirational Journal VolumeSS01”, p.60, Lulu.com
Robert C. Worstell, Earl Nightingale (2015). “How to Completely Change Your Life in 30 Seconds”, p.12, Lulu.com
Dr. Robert C. Worstell, Dorothea Brande, Claude M. Bristol, Earl Nightingale, Napoleon Hill (2017). “Mindset StackingTM Inspirational Journal VolumeSS01”, p.164, Lulu.com