Robert P. Millon, "Zapata: The Ideology of a Peasant Revolutionary", International Publishers Co, 1995, pg. 60, [1]
Guillermo de la Peña, "A legacy of promises: agriculture, politics and ritual in the Morelos highlands of México", Manchester University Press ND, 1982, pg. 63, [2]
Donald Clark Hodges, "Mexican anarchism after the revolution", University of Texas Press, 1995, pg. 15, [3]