North, D. C., Wallis, J. J., & Weingast, B. R. (2009). Violence and social orders: A conceptual framework for interpreting recorded human history. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)North, Douglass Cecil, John Joseph Wallis, agus Barry R. Weingast. Violence and Social Orders: A Conceptual Framework for Interpreting Recorded Human History. Cambridge ; New York: Cambridge University Press, 2009.
Lua MLA (8ú heag.)North, Douglass Cecil, et al. Violence and Social Orders: A Conceptual Framework for Interpreting Recorded Human History. Cambridge University Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.