WAN YUSOFF, Prof. Dr. Haji Wan Sulaiman. PROFIT AND ADVERTISING RELATIONSHIP BASED ON PRODUCT DIFFERENTIATION. I-iECONS e-proceedings, [S. l.], v. 10, n. 1, p. 65–76, 2023. DOI: 10.33102/iiecons.v10i1.74. Disponível em: https://epiiecons.usim.edu.my/index.php/eproceeding/article/view/74. Acesso em: 30 may. 2025.