North, Douglass C. (1968). "Sources of Productivity Change in Ocean Shipping, 1600-1850". Journal of Political Economy. 76 (5): 953-970. doi:10.1086/259462. JSTOR1830031.
North, Douglass C. (1968). "Sources of Productivity Change in Ocean Shipping, 1600-1850". Journal of Political Economy. 76 (5): 953-970. doi:10.1086/259462. JSTOR1830031.
nobelprize.org
The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 1993, Pressemeddelelse, 12. oktober 2003.