MOHD NOR, Ahmad Khair. Semiotic of Billboards. Jurnal Peradaban Melayu, [S. l.], v. 6, p. 18–24, 2010. Disponível em: https://ejournal.upsi.edu.my/index.php/JPM/article/view/3388. Acesso em: 5 dec. 2025.