Boyd-Bowman P. Stanley Martin Sapon, A study of the development of the interrogative in Spanish from the twelfth through the fifteenth centuries. Columbus, Ohio, 1951. 99 págs. NRFH [Internet]. 1 de octubre de 2007 [citado 26 de abril de 2024];5(4):430-1. Disponible en: https://nrfh.colmex.mx/index.php/nrfh/article/view/3358