Abbas, Anas. “Vocational Health and Safety in Yemeni Work Organizations: An Empirical Study”. Al-Balqa Journal for Research and Studies 12, no. 2 (August 31, 2008): 178–230. Accessed October 10, 2026. https://ajrs.ammanu.edu.jo/ojs/index.php/albalqajournal/article/view/342.