Berger, R. (1973). Impeachment: The constitutional problems. Harvard University Press.
芝加哥风格引文Berger, Raoul. Impeachment: The Constitutional Problems. Cambridge: Harvard University Press, 1973.
MLA引文Berger, Raoul. Impeachment: The Constitutional Problems. Harvard University Press, 1973.
警告：这些引文格式不一定是100％准确.