https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=2ahUKEwiL2ePokbbeAhWF0FMKHYuwCc8QFjAAegQIAxAB&url=https%3A%2F%2Fes.scribd.com%2Fdocument%2F181800596%2FF-Osorio-Epistemologia-de-Las-Ciencias-Sociales&usg=AOvVaw1LC3NFcdBNRwbIvEUdAbFJ
