BUANA, D. S.; MIRZANTI, I. R. Value Proposition Testing Using Indirect Customer Observation Method for Personafic. European Journal of Business and Management Research, [S. l.], v. 6, n. 4, p. 84–87, 2021. DOI: 10.24018/ejbmr.2021.6.4.931. Disponível em: https://ejbmr.org/index.php/ejbmr/article/view/931. Acesso em: 12 jun. 2024.