San Diego, R. (1991). Walking into the valley of desolation. U.P. Newsletter.
芝加哥风格引文San Diego, Rod. "Walking into the Valley of Desolation." U.P. Newsletter 1991.
MLA引文San Diego, Rod. "Walking into the Valley of Desolation." U.P. Newsletter, 1991.
警告：这些引文格式不一定是100％准确.