^ abc Asimov, Isaac. In Memory Yet Green. "The date of my birth, as I celebrate it, was January 2, 1920. It could not have been later than that. It might, however, have been earlier. Allowing for the uncertainties of the times, of the lack of records, of the Jewish and Julian calendars, it might have been as early as October 4, 1919. There is, however, no way of finding out. My parents were always uncertain and it really doesn't matter. I celebrate January 2, 1920, so let it be.".
^ Asimov, Isaac. In Memory Yet Green. "There are three very simple English words: 'Has,' 'him' and 'of.' Put them together like this—'has-him-of'—and say it in the ordinary fashion. Now leave out the two h's and say it again and you have Asimov.".
^ Isaac Asimov, "The Way of Reason," in In Pursuit of Truth: Essays on the Philosophy of Karl Popper on the Occasion of his 80th Birthday,, ed. Paul Levinson, Humanities Press, 1982, pp. ix-x.
^ Asimov, Isaac (1995). I. Asimov: A Memoir. New York: Bantam. pp. 338. ISBN 0-553-56997-x.
^ Asimov, Isaac (1995). I. Asimov: A Memoir. New York: Bantam. pp. 336–338. ISBN 0-553-56997-x.
^ Asimov, Isaac (1988), Prelude to Foundation, Bantam Books, xiii–xv