?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Herrera+Reyes%2C+Sandra+Margarita&rft.aufirst=Sandra+Margarita&rft.aulast=Herrera+Reyes&rft.degree=Masters&rft.date=14+Marzo+2022&rft.title=Dise%C3%B1o+de+un+programa+de+preparaci%C3%B3n+para+la+jubilaci%C3%B3n+de+los+cotizantes+en+Instituto+Salvadore%C3%B1o+del+Seguro+Social%2C+San+Miguel.