^Simon, S. Fanny (February 1946). "Anarchism and Anarcho-Syndicalism in South America". The Hispanic American Historical Review (Durham: Duke University Press) 26 (1): 38–59. doi:10.2307/2507692.
^Simon, S. Fanny (February 1946). "Anarchism and Anarcho-Syndicalism in South America". The Hispanic American Historical Review (Durham: Duke University Press) 26 (1): 38–59. doi:10.2307/2507692.