Barrientos Marin, J., & Vasco Correa, C. A. (2020). Biofuel Production and Rural Employment in Colombia 2009-2015. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Barrientos Marin, Jorge, i Carlos Andrés Vasco Correa. Biofuel Production and Rural Employment in Colombia 2009-2015. Universidad Pedagógica y Tecnológica de Colombia, 2020.
MLA način citiranja (9. izdanje)Barrientos Marin, Jorge, i Carlos Andrés Vasco Correa. Biofuel Production and Rural Employment in Colombia 2009-2015. Universidad Pedagógica y Tecnológica de Colombia, 2020.
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