ポール・R・エーリック
↑ Professor Paul R. Ehrlich ForMemRS, The Royal Society, retrieved September 26, 2012.
↑ Mieszkowski, Katharine (2008年9月17日). “Do we need population control?”. Salon.com. 2012年9月27日閲覧。
↑ “The Population Bust: Demographic Decline and the End of Capitalism as We Know It”. Foreign Affairs. (September 2019). ""Ehrlich's prophecy, of course, proved wrong, for reasons that Bricker and Ibbitson elegantly chart in Empty Planet.""
↑ Leaders from the 1960s: A Biographical Sourcebook of American Activism. Greenwood Press, 1994. (1994). p. 318. ISBN 9780313274145. https://books.google.com/books?id=oHYD-XUiSBEC&pg=PA318
↑ Tierney, John (1990年12月2日). “Betting on the Planet”.