"Ever Since Darwin: Reflections in Natural History". Book by Stephen Jay Gould. "Why We Should Not Name Human Races - A Biological View", p. 231, 1977.
"Exclusive Interview With Narendra Modi: 'We Are Natural Allies'". Interview with Nancy Gibbs, Zoher Abdoolcarim and Nikhil Kumar, time.com. May 7, 2015.
Richard Henry Pratt, Robert Marshall Utley (1979). “The Indian Industrial School, Carlisle, Pennsylvania: Its Origins, Purposes, Progress, and the Difficulties Surmounted”
Quoted by Charu Chandra Banerjee in a speech at Dhaka Purva Bangla Brahmo Samaj; "Brahmananda Keshub Chunder Sen: Testimonies in Memoriam" compiled by G.C.Banerji, Allahabad, 1934.
Speech delivered at Nagpur University Convocation on 5th December 1936, "Educational Speeches" by Dr. Shyamaprasad Mookerjee, A.Mukherjee & Co. (Private) Ltd., 2 College Square, Kolkata 700 012, 1959.
Speech delivered at Gurkula Visvavidyalaya Convocation on 25th April 1943, "Educational Speeches" by Dr. Shyamaprasad Mookerjee, A.Mukherjee & Co. (Private) Ltd., 2 College Square, Kolkata 700 012, 1959.