Vallejo Zamudio, L. E. (2015). Tax reform: Scope and limitations. Universidad Pedagógica y Tecnológica de Colombia.
Chicago Style (17. basım) AtıfVallejo Zamudio, Luis E. Tax Reform: Scope and Limitations. Universidad Pedagógica y Tecnológica de Colombia, 2015.
MLA (9th ed.) AtıfVallejo Zamudio, Luis E. Tax Reform: Scope and Limitations. Universidad Pedagógica y Tecnológica de Colombia, 2015.
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