Segovia, Rafael. «Karl M. Schmitt. Communism in Mexico, a Study in Political Frustration. Austin, Tx. : University of Texas Press, 1965. 290 P». Foro Internacional, vol. 6, n.º 1, julio de 1965, pp. 222-3, https://forointernacional.colmex.mx/index.php/fi/article/view/273.