Lua APA (7ú heag.)
Mokyr, J. (1990). The lever of riches: Technological creativity and economic progress. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)
Mokyr, Joel. The Lever of Riches: Technological Creativity and Economic Progress. New York: Oxford University Press, 1990.
Lua MLA (9ú heag.)
Mokyr, Joel. The Lever of Riches: Technological Creativity and Economic Progress. Oxford University Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.