Bergquist, Charles; David J. Robinson (1997–2005). «Colombia». Microsoft Encarta Online Encyclopedia 2005. Microsoft Corporation. Consultado em 16 de abril de 2006. Arquivado do original em 1 de novembro de 2009A referência emprega parâmetros obsoletos |coautor= (ajuda)On April 9, 1948, Gaitán was assassinated outside his law offices in downtown Bogotá. The assassination marked the start of a decade of bloodshed, called La Violencia (the violence), which took the lives of an estimated 180,000 Colombians before it subsided in 1958.
Bergquist, Charles; David J. Robinson (1997–2005). «Colombia». Microsoft Encarta Online Encyclopedia 2005. Microsoft Corporation. Consultado em 16 de abril de 2006. Arquivado do original em 1 de novembro de 2009A referência emprega parâmetros obsoletos |coautor= (ajuda)On April 9, 1948, Gaitán was assassinated outside his law offices in downtown Bogotá. The assassination marked the start of a decade of bloodshed, called La Violencia (the violence), which took the lives of an estimated 180,000 Colombians before it subsided in 1958.
worldcat.org
Nohlen, Dieter (2005). Elections in the Americas: A Data Handbook. New York: Oxford University Press. ISBN0199253587. OCLC58051010