Méndez-Sayago, J. M., Méndez Sayago, J. A., & Hernández Escolar, H. A. (2017). Impact of Retributive Taxes for Spills Control in Colombia. Universidad Pedagógica y Tecnológica de Colombia.
Chicago Style (17. basım) AtıfMéndez-Sayago, Johanna Mildred, Jhon Alexánder Méndez Sayago, ve Hugo Alfonso Hernández Escolar. Impact of Retributive Taxes for Spills Control in Colombia. Universidad Pedagógica y Tecnológica de Colombia, 2017.
MLA (9th ed.) AtıfMéndez-Sayago, Johanna Mildred, et al. Impact of Retributive Taxes for Spills Control in Colombia. Universidad Pedagógica y Tecnológica de Colombia, 2017.
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