Useche, I. V. (2013). Patriotism or proletarian universalism. The place of the world in Colombian workerism and socialism, 1904-1930. Universidad Pedagógica y Tecnológica de Colombia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUseche, Isidro Vanegas. Patriotism or Proletarian Universalism. The Place of the World in Colombian Workerism and Socialism, 1904-1930. Universidad Pedagógica y Tecnológica de Colombia, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUseche, Isidro Vanegas. Patriotism or Proletarian Universalism. The Place of the World in Colombian Workerism and Socialism, 1904-1930. Universidad Pedagógica y Tecnológica de Colombia, 2013.
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