Retrieved 2 May 2006. (in English) / (in Italian) / (in French) /(in German) "Secret Warfare: Operation Gladio and NATO's Stay-Behind Armies".
Diakses tanggal 2 May 2006.  ^ (Inggris)/(Italia)/(Prancis)/(Jerman) "Secret Warfare: Operation Gladio and NATO's Stay-Behind Armies".