APA Edition Citation

Fitz Gibbon, C. (1976). Secret intelligence in the twentieth century. Hart-Davis Mac Gebban.

Chicago Edition Citation

Fitz Gibbon, Constantine. Secret Intelligence in the Twentieth Century. Hart-Davis Mac Gebban, 1976.

MLA Edition Citation

Fitz Gibbon, Constantine. Secret Intelligence in the Twentieth Century. Hart-Davis Mac Gebban, 1976.

Warning: These citations may not always be 100% accurate.