Edda Mussolini Ciano, My Truth.

Andrea Niccoletti, “The Decline and Fall of Edda Ciano”, n. p.

Ray Moseley, Mussolini’s Shadow.

Katrin Paehler, Third Reich’s Intelligence Services.

“Hildegard Beetz”, June 14, 1945.

Corinna Peniston-Bird and Emma Vickers, eds., Gender and the Second World War: Lessons of War (London: Palgrave Macmillan, 2017).

Zenone Benini, Carcere degli Scalzi (Firenze: Ponte alle Grazie, 1994).

“Hildegard Beetz”, October 26, 1943.

Vecchioni, “Quelle due belle spie”, n. p.