Não informado. (1989). Dairy, food and environmental sanitation. International Association of Milk, Food and Environmental Sanitarians.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Dairy, Food and Environmental Sanitation. Ames, Iowa: International Association of Milk, Food and Environmental Sanitarians, 1989.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Dairy, Food and Environmental Sanitation. International Association of Milk, Food and Environmental Sanitarians, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.