Mahatma Gandhi, Jawaharlal Nehru, Rabindranath Tagore (1968). “Wit and Wisdom of Gandhi, Nehru, Tagore: Being a Treasury of Over Ten Thousand Invaluable and Inspiring Thoughts, Views, and Obervations on about Eight Hundred Subjects of Popular Interest, Collected from the Speeches and Writings of These Three Great Leaders of Modern India”
Henry Moseley's letter to Margery Moseley (February 2, 1913), as quoted in "H. G. J. Moseley: The Life and Letters of an English Physicist 1887-1915" edited by J. L. Heilbron (p. 201), 1974.