シンガー (企業)
↑ The Singer strike 1911, Glasgow Digital Library
↑ Sewing Machines Machine-History.Com
↑ Sanders, Richard Robert S. Clark (1877-1956), Press for Conversion! magazine, Issue # 53, "Facing the Corporate Roots of American Fascism," March 2004. Published by the Coalition to Oppose the Arms Trade.
↑ Singer Manufacturing Co. 1941 1911A1, From the Karl Karash collection/Images Copyright Karl Karash 2002
↑ Miller, Matthew; Clifford, Mark L.; Zegel, Susan (2002年8月5日). “Dishonored Dealmaker”. Businessweek. http://www.businessweek.com/magazine/content/02_31/b3794153.htm 2007年3月25日閲覧。