Secret intelligence in the twentieth century

MLA

FitzGibbon, Constantine. Secret Intelligence In the Twentieth Century. London: Hart-Davis, MacGibbon, 1976.

APA

FitzGibbon, C. (1976). Secret intelligence in the twentieth century. London: Hart-Davis, MacGibbon.

Chicago

FitzGibbon, Constantine, Secret Intelligence In the Twentieth Century. London: Hart-Davis, MacGibbon, 1976.