Haris Hafizal Abd. Hamid. (2010). Evaluation of an ultrasonic assisted extraction procedure for the determination of heavy metals in seafood certified reference materials. Universiti Putra Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Haris Hafizal Abd. Hamid. Evaluation of an Ultrasonic Assisted Extraction Procedure for the Determination of Heavy Metals in Seafood Certified Reference Materials. Serdang: Universiti Putra Malaysia, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Haris Hafizal Abd. Hamid. Evaluation of an Ultrasonic Assisted Extraction Procedure for the Determination of Heavy Metals in Seafood Certified Reference Materials. Universiti Putra Malaysia, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.