* Ramírez, Sergio and Conrad, Robert Edgar trans., "Sandino: The Testimony of a Nicaraguan Patriot 1921–1934," Princeton University Press (1990)* Wünderich, Volker.
* Ramírez, Sergio and Conrad, Robert Edgar trans., "Sandino: The Testimony of a Nicaraguan Patriot 1921–1934," Princeton University Press (1990)* Wünderich, Volker.