Calhoun. The Presidency of Ulysses S. Grant. University Press of Kansas.
芝加哥风格引文Calhoun. The Presidency of Ulysses S. Grant. University Press of Kansas.
MLA引文Calhoun. The Presidency of Ulysses S. Grant. University Press of Kansas.
警告：这些引文格式不一定是100％准确.