Ingersoll, R. G., & Greeley, R. E. (1983). The best of Robert Ingersoll: Immortal infidel; selections from his writings and speeches. Prometheus Books.
Chicago-Zitierstil (17. Ausg.)Ingersoll, Robert Green, und Roger E. Greeley. The Best of Robert Ingersoll: Immortal Infidel; Selections from His Writings and Speeches. New York: Prometheus Books, 1983.
MLA-Zitierstil (8. Ausg.)Ingersoll, Robert Green, und Roger E. Greeley. The Best of Robert Ingersoll: Immortal Infidel; Selections from His Writings and Speeches. Prometheus Books, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.