North, D. C. (2005). Understanding the process of economic change. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)North, Douglass Cecil. Understanding the Process of Economic Change. Princeton, N.J.: Princeton University Press, 2005.
Lua MLA (8ú heag.)North, Douglass Cecil. Understanding the Process of Economic Change. Princeton University Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.