LAW JOE WIN; ABDUL HALIM A. GHANI. Investigation on the Impact of Uncertified Contractors on Project Performance in the Northern Region of Malaysia. Recent Trends in Civil Engineering and Built Environment, [S. l.], v. 2, n. 1, p. 80–86, 2021. Disponível em: https://penerbit.uthm.edu.my/periodicals/index.php/rtcebe/article/view/1526. Acesso em: 9 apr. 2026.