"Old Spanish." YourDictionary, n.d. Web. 14 October 2018. <http://www.yourdictionary.com/old-spanish>.
Old Spanish. (n.d.). Retrieved October 14th, 2018, from http://www.yourdictionary.com/old-spanish
Early form of the Spanish language that was spoken on the Iberian Peninsula from the 10th century until roughly the beginning of the 15th century, before a consonantic readjustment gave rise to the evolution of Modern Spanish.
English Wiktionary. Available under CC-BY-SA license.