North, D. C. (2006). A conceptual framework for interpreting recorded human history. National Bureau of Economic Research.
芝加哥风格引文North, Douglass C. A Conceptual Framework for Interpreting Recorded Human History. Cambridge: National Bureau of Economic Research, 2006.
MLA引文North, Douglass C. A Conceptual Framework for Interpreting Recorded Human History. National Bureau of Economic Research, 2006.
警告：这些引文格式不一定是100％准确.