Ruzulan, Z. ., M. A. . Jamaludin, A. M. . Yahaya, and H. M. . Fathullah Harun. “Malaysian Hotel Certification in the Islamic Tourism Industry”. Environment-Behaviour Proceedings Journal, vol. 7, no. SI7, Aug. 2022, pp. 421-5, doi:10.21834/ebpj.v7iSI7.3811.