Untiedt. Cowboys, Cops, Killers, and Ghosts. University of North Texas Press.
芝加哥风格引文Untiedt. Cowboys, Cops, Killers, and Ghosts. University of North Texas Press.
MLA引文Untiedt. Cowboys, Cops, Killers, and Ghosts. University of North Texas Press.
警告：这些引文格式不一定是100％准确.