Ellis, R. J. (1989). Dilemmas of presidential leadership: From Washington through Lincoln. Transaction.
芝加哥风格引文Ellis, Richard J. Dilemmas of Presidential Leadership: From Washington Through Lincoln. New Brunswick, N.J: Transaction, 1989.
MLA引文Ellis, Richard J. Dilemmas of Presidential Leadership: From Washington Through Lincoln. Transaction, 1989.
警告：这些引文格式不一定是100％准确.