Yáñez Gallardo, Rodrigo, Héctor Ahumada Alvarado, and Elias Rivas Aguayo. 2012. “THE VIGNETTE TECHNIQUE AND ITS APPLICATION TO NURSING RESEARCH”. Ciencia Y Enfermería 18 (3):9-15. https://revistas.udec.cl/index.php/cienciayenfermeria/article/view/9337.