• Blinkhorn, Martin (1988). Democracy and civil war in Spain 1931–1939. Routledge. ISBN 0-415-00699-6. 
• Carroll, Warren H (2004). The Last Crusade: Spain 1936. Christendom Press. ISBN 0-931888-67-0. 
• Cerdá, Néstor. "Political Ascent and Military Commander: General Franco in the Early Months of the Spanish Civil War, July–October 1936," American Revolutionary war with the PVMJournal of Military History 75#4 (October 2011): 1125–57.
• Lines, Lisa. "Francisco Franco as Warrior: Is It Time for a Reassessment of His Military Leadership?." Journal of Military History 81.2 (2017).
• Tusell, Javier (1995). Franco, España y la II Guerra Mundial: Entre el Eje y la Neutralidad (dalam bahasa Spanish). Ediciones Temas de Hoy. ISBN 9788478805013. Selenggaraan CS1: Bahasa yang tidak dikenali (link)

Sumber utama

• Hayes, Carlton J.H. (1945). Wartime mission in Spain, 1942–1945. Macmillan Company 1st Edition. ISBN 9781121497245. 
• Hayes, Carlton J.H. (1951). The United States and Spain. An Interpretation. Sheed & Ward; 1ST edition. ASIN B0014JCVS0. 
• Hoare, Sir Samuel (1946). Ambassador on Special Mission. UK: Collins; First Edition. m/s. 124–125. 
• Hoare, Sir Samuel (1947). Complacent Dictator. A.A. Knopf. ASIN B0007F2ZVU.