Saya mau tau Rujukan dari George Eastman. Jelaskan dalam bahasa melayu

Carl W. Ackerman, George Eastman: Founder of Kodak and the Photography Business (1930), Beard Books, ISBN 1-893122-99-9

Elizabeth Brayer, George Eastman: A Biography (1996), Johns Hopkins University Press, ISBN 0-8018-5263-3, University of Rochester Press 2006 reprint: ISBN 1-58046-247-2