Zulkarnain Mohamed Idris. (2011). Optimization of fermentation conditions for the production of bioactive phenolic compounds from palm oil mill effluent using Aspergillus niger IBS-103ZA. Kulliyyah of Engineering, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Zulkarnain Mohamed Idris. Optimization of Fermentation Conditions for the Production of Bioactive Phenolic Compounds from Palm Oil Mill Effluent Using Aspergillus Niger IBS-103ZA. Kuala Lumpur: Kulliyyah of Engineering, International Islamic University Malaysia, 2011.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Zulkarnain Mohamed Idris. Optimization of Fermentation Conditions for the Production of Bioactive Phenolic Compounds from Palm Oil Mill Effluent Using Aspergillus Niger IBS-103ZA. Kulliyyah of Engineering, International Islamic University Malaysia, 2011.