Chris Anderson. TED Talks: The Official TED Guide to Public Speaking. New York: Houghton Mifflin Harcourt, 2016, 64.
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Эту цитату друг Изидора Дональд Шефф приводит в письме в New York Times: http://www.nytimes.com/1988/01/19/opinion/l-izzy-did-you-ask-a-good-question-today-712388.html.
