Yogananda (Paramahansa), Swami Dhirananda (1925). “General Principles and Merits of Yogoda, Or, Tissue-will System of Body and Mind Perfection, and the Highest Technique of Concentration and Meditation”
Mahatma Gandhi (1965). “Glorious Thoughts of Gandhi: Being a Treasury of about Ten Thousand Valuable and Inspiring Thougths of Mahatma Gandhi, Classified Under Four Hundred Subjects”