(EN) Frequently Asked Questions About W. J. Sidis, su sidis.net. URL consultato il 3 aprile 2019.
«Was he religious? 'He espoused no religion, but said that... the kind of a God he did not believe in was the "big boss of the Christians", adding that he believed in something that is in a way apart from a human being (Boston Herald, May 14, 1919)»