Barbera Burgos, D. L., Arana Espin, J. D., Herrera Tamayo, E. V., & Encalada Tenorio, G. J. (2018). Antique marketing vs digital marketing applied to the financial instruments of the Guayaquil Securities Bank. Ecuadorian Science Journal, 2(2), 9-12. https://doi.org/10.46480/esj.2.2.16