Kratzer, A. (2012). Modals and conditionals. Oxford University Press.
芝加哥风格引文Kratzer, Angelika. Modals and Conditionals. Great Clarendon Street, Oxford: Oxford University Press, 2012.
MLA引文Kratzer, Angelika. Modals and Conditionals. Oxford University Press, 2012.
警告：这些引文格式不一定是100％准确.