Peña-Rodríguez, G., & Ortega-Triana, L. R. (2014). Morphological and structural characterization of fly ash powders. Universidad Pedagógica y Tecnológica de Colombia - UPTC.
Čikaški stil citiranja (17. izdanje)Peña-Rodríguez, Gabriel, i Luis René Ortega-Triana. Morphological and Structural Characterization of Fly Ash Powders. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2014.
MLA način citiranja (9. izdanje)Peña-Rodríguez, Gabriel, i Luis René Ortega-Triana. Morphological and Structural Characterization of Fly Ash Powders. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2014.
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