Barahona, E. A. T., Medina, J. X. L., & Díaz, E. T. (2012). Positioning system applied to the 3D printing technique: Modeling by fused deposition. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Barahona, Edgar Absalón Torres, Jersson Xavier León Medina, i Edwin Torres Díaz. Positioning System Applied to the 3D Printing Technique: Modeling by Fused Deposition. Universidad Pedagógica y Tecnológica de Colombia, 2012.
MLA način citiranja (9. izdanje)Barahona, Edgar Absalón Torres, et al. Positioning System Applied to the 3D Printing Technique: Modeling by Fused Deposition. Universidad Pedagógica y Tecnológica de Colombia, 2012.
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