DUNCAN, Zoey. Quel montant devrais-je consacrer au marketing?. Canadian Journal of Optometry, [S. l.], v. 83, n. 3, p. 59–60, 2021. DOI: 10.15353/cjo.v83i3.4383. Disponível em: https://openjournals.uwaterloo.ca/index.php/cjo/article/view/4383. Acesso em: 16 may. 2025.