Billington, R. A. (1962). The Far Western frontier, 1830-1860. Harper & Row.
芝加哥风格引文Billington, Ray Allen. The Far Western Frontier, 1830-1860. New York: Harper & Row, 1962.
MLA引文Billington, Ray Allen. The Far Western Frontier, 1830-1860. Harper & Row, 1962.
警告：这些引文格式不一定是100％准确.