Hassan, S. (1987). Bioavailability of selenium in feedstuffs as studied in the chick. Dept. of Clinical Nutrition, College of Veterinary Medicine, Swedish University of Agricultural Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hassan, Saifeldin. Bioavailability of Selenium in Feedstuffs as Studied in the Chick. Uppsala: Dept. of Clinical Nutrition, College of Veterinary Medicine, Swedish University of Agricultural Sciences, 1987.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hassan, Saifeldin. Bioavailability of Selenium in Feedstuffs as Studied in the Chick. Dept. of Clinical Nutrition, College of Veterinary Medicine, Swedish University of Agricultural Sciences, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.