Iswandi Harahap. (2020). A study on the status of types of vinegar and their rules from Islamic perspective: A case study in the Malaysian market. International Institute of Halal Research and Training, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Iswandi Harahap. A Study on the Status of Types of Vinegar and Their Rules from Islamic Perspective: A Case Study in the Malaysian Market. Kuala Lumpur: International Institute of Halal Research and Training, International Islamic University Malaysia, 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Iswandi Harahap. A Study on the Status of Types of Vinegar and Their Rules from Islamic Perspective: A Case Study in the Malaysian Market. International Institute of Halal Research and Training, International Islamic University Malaysia, 2020.