Zulhilmi. (2020). The perceptions of hoteliers and government officers on the needs of halal certification for hotel industry in Aceh. International Institute for Halal Research and Training, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Zulhilmi. The Perceptions of Hoteliers and Government Officers on the Needs of Halal Certification for Hotel Industry in Aceh. Kuala Lumpur: International Institute for Halal Research and Training, International Islamic University Malaysia, 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Zulhilmi. The Perceptions of Hoteliers and Government Officers on the Needs of Halal Certification for Hotel Industry in Aceh. International Institute for Halal Research and Training, International Islamic University Malaysia, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.