Hernández-Vásquez, Akram, and Horacio Chacón-Torrico. “Manipulation, Analysis, and Visualization of Data from the Demographic and Family Health Survey With the R Program”. Revista Peruana de Medicina Experimental y Salud Pública 36, no. 1 (March 15, 2019): 128–33. Accessed May 2, 2024. https://rpmesp.ins.gob.pe/index.php/rpmesp/article/view/4062.