Hardt, J. P. (1961). The cold war economic gap: The increasing threat to American supremacy. Praeger.
芝加哥风格引文Hardt, John Pearce. The Cold War Economic Gap: The Increasing Threat to American Supremacy. New York: Praeger, 1961.
MLA引文Hardt, John Pearce. The Cold War Economic Gap: The Increasing Threat to American Supremacy. Praeger, 1961.
警告：这些引文格式不一定是100％准确.