Vallejo Zamudio, L. E. (2015). The fall in oil prices and its impact on the Colombian economy. Universidad Pedagógica y Tecnológica de Colombia.
芝加哥风格引文Vallejo Zamudio, Luis E. The Fall in Oil Prices and Its Impact on the Colombian Economy. Universidad Pedagógica y Tecnológica de Colombia, 2015.
MLA引文Vallejo Zamudio, Luis E. The Fall in Oil Prices and Its Impact on the Colombian Economy. Universidad Pedagógica y Tecnológica de Colombia, 2015.
警告：这些引文格式不一定是100％准确.
