Gregory, P. R. (2009). Terror by quota: State security from Lenin to Stalin : (an archival study). Yale University Press.
芝加哥风格引文Gregory, Paul R. Terror by Quota: State Security from Lenin to Stalin : (an Archival Study). New Haven: Yale University Press, 2009.
MLA引文Gregory, Paul R. Terror by Quota: State Security from Lenin to Stalin : (an Archival Study). Yale University Press, 2009.
警告：这些引文格式不一定是100％准确.