TAJUDDIN, Siti Mariam; JAILANI, Azrol. Challenge Based Learning in Students for Vocational Skills. International Journal of Independent Research Studies, [S. l.], v. 2, n. 2, p. 89–94, 2013. Disponível em: https://ecsenet.com/index.php/2304-6953/article/view/655. Acesso em: 15 nov. 2025.