Abdul Hamid, Suhaila, and Hamdi Hakeim Mudasir. 2005. “An Exploratory Study on The Managerial Ownership and the Informativeness of Earnings in the Trading and Services Sector: An Evidence from Malaysia”. The Journal of Muamalat and Islamic Finance Research 2 (1):93-112. https://jmifr.usim.edu.my/index.php/jmifr/article/view/39.