Doyle, Michael W. (dezembro de 1986). «Liberalism and World Politics». The American Political Science Review. 80 (4): 1151–1169. JSTOR1960861. doi:10.2307/1960861
Doyle, Michael W. (dezembro de 1986). «Liberalism and World Politics». The American Political Science Review. 80 (4): 1151–1169. JSTOR1960861. doi:10.2307/1960861