Karl Marx, Friedrich Engels, John E. Elliott (1981). “Marx and Engels on economics, politics, and society: essential readings with editorial commentary”
"InDepth InterView Exclusive: Patti LuPone Talks FAR AWAY PLACES, 54 Below, PARKER, Broadway, Hollywood & More". Interview with Pat Cerasaro, www.broadwayworld.com. February 7, 2013.
John Woolman (1847). “A journal of the life, gospel labours, and Christian experiences of ... John Woolman ...: To which are added his last epistle, and other writings ...”, p.8