Berglund, B. (1988). Calving performance, production and reproduction in early lactation: Studies on variation and interrelationships in Swedish dairy breeds under experimental conditions. Sveriges lantbruksuniversitet.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Berglund, Britt. Calving Performance, Production and Reproduction in Early Lactation: Studies on Variation and Interrelationships in Swedish Dairy Breeds Under Experimental Conditions. Uppsala: Sveriges lantbruksuniversitet, 1988.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Berglund, Britt. Calving Performance, Production and Reproduction in Early Lactation: Studies on Variation and Interrelationships in Swedish Dairy Breeds Under Experimental Conditions. Sveriges lantbruksuniversitet, 1988.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.