Alan Knight, "The Mexican Revolution: Counter-revolution and reconstruction", U of Nebraska Press, 1990, pg. 209, [1]
Robert Sigfrid Wicks, Roland H. Harrison, "Buried cities, forgotten gods: William Niven's life of discovery and revolution in Mexico and the American Southwest", Texas Tech University Press, 1999, pgs. 158-159, [2]
Alan Knight, "The Mexican Revolution: Counter-revolution and reconstruction", U of Nebraska Press, 1990, pg. 61, [3]
Samuel Brunk, "Emiliano Zapata: revolution & betrayal in Mexico", UNM Press, 1995, p. 101, [4]
