Mokyr, J. (1990). The lever of riches: Technological creativity and economic progress. 0xford University Press.
Chicago-referens (17:e uppl.)Mokyr, Joel. The Lever of Riches: Technological Creativity and Economic Progress. New York: 0xford University Press, 1990.
MLA-referens (9:e uppl.)Mokyr, Joel. The Lever of Riches: Technological Creativity and Economic Progress. 0xford University Press, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.