Fonseca Alfonso, Y. L. (2019). The agony of labor law: A history from its origins to its confines. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Fonseca Alfonso, Yair Leonardo. The Agony of Labor Law: A History from Its Origins to Its Confines. Universidad Pedagógica y Tecnológica de Colombia, 2019.
MLA način citiranja (9. izdanje)Fonseca Alfonso, Yair Leonardo. The Agony of Labor Law: A History from Its Origins to Its Confines. Universidad Pedagógica y Tecnológica de Colombia, 2019.
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