Keever. Death Zones and Darling Spies. University of Nebraska Press.
芝加哥风格引文Keever. Death Zones and Darling Spies. University of Nebraska Press.
MLA引文Keever. Death Zones and Darling Spies. University of Nebraska Press.
警告：这些引文格式不一定是100％准确.
APA引文