Payne, Stanley G. (1973). "A History of Spain and Portugal (Print Edition)". University of Wisconsin Press. 2, Ch. 25. Library of Iberian resources online: 632. Archived from the original on 18 February 2019. Retrieved 30 May 2007.
Payne, Stanley G. (1973). "A History of Spain and Portugal (Print Edition)". University of Wisconsin Press. 2, Ch. 26. Library of Iberian resources online: 646–647. Archived from the original on 8 November 2017. Retrieved 15 May 2007.
Payne, Stanley G. (1973). "A History of Spain and Portugal (Print Edition)". University of Wisconsin Press. 2, Ch. 25. Library of Iberian resources online: 632. Archived from the original on 18 February 2019. Retrieved 30 May 2007.
Payne, Stanley G. (1973). "A History of Spain and Portugal (Print Edition)". University of Wisconsin Press. 2, Ch. 26. Library of Iberian resources online: 646–647. Archived from the original on 8 November 2017. Retrieved 15 May 2007.