Barker, R. (2018). International relations and policies. Clanrye International.
芝加哥风格引文Barker, Robert. International Relations and Policies. New York: Clanrye International, 2018.
MLA引文Barker, Robert. International Relations and Policies. Clanrye International, 2018.
警告：这些引文格式不一定是100％准确.