Ambar, S. M. (2012). How governors built the modern American presidency. University of Pennsylvania Press.
芝加哥风格引文Ambar, Saladin M. How Governors Built the Modern American Presidency. Philadelphia: University of Pennsylvania Press, 2012.
MLA引文Ambar, Saladin M. How Governors Built the Modern American Presidency. University of Pennsylvania Press, 2012.
警告：这些引文格式不一定是100％准确.