Dominic Tierney (11a de Junio 2007). FDR and the Spanish Civil War: Neutrality and Commitment in the Struggle that Divided America. Duke University Press. p. 63. ISBN 978-0-8223-4055-3. [2] Alirita la 6an de februaro 2018.
theguardian.com
MI6 spent $200m bribing Spaniards in second world war, The Guardian, [1] Alirita la 6an de februaro 2018.
