El-Zaibak, I. M. S., & Osman, H. G. (1985). Studies on the biosynthesis of riboflavin (Vitamin B2) by the micro-organism ermothecium ashby II. King Abdulaziz University,Fuclty of Science, Department of Chemistry.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)El-Zaibak, Irfan Mohammed Sharif, و Hussein Ghaleb Osman. Studies on the Biosynthesis of Riboflavin (Vitamin B2) by the Micro-organism Ermothecium Ashby II. Riyadh: King Abdulaziz University,Fuclty of Science, Department of Chemistry, 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)El-Zaibak, Irfan Mohammed Sharif, و Hussein Ghaleb Osman. Studies on the Biosynthesis of Riboflavin (Vitamin B2) by the Micro-organism Ermothecium Ashby II. King Abdulaziz University,Fuclty of Science, Department of Chemistry, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.