Robert Green Ingersoll (1920). “Ingersoll: Fifty Great Selections, Lectures, Tributes, After Dinner Speeches and Essays, Carefully Selected from the Twelve Volume Dresden Edition of Colonel Ingersoll's Complete Works”
"A Lesson on Elementary, Worldly Wisdom as it Relates to Investment Management and Business". Charlie Munger's lecture to the students at the University of Southern California in Los Angeles, 1994.