Sompop Kassumma. (1985). Evaluating crossbred dairy cattle for reproduction and production traits and their genetic potential in Thailand. Iowa State University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sompop Kassumma. Evaluating Crossbred Dairy Cattle for Reproduction and Production Traits and Their Genetic Potential in Thailand. Ames: Iowa State University Press, 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sompop Kassumma. Evaluating Crossbred Dairy Cattle for Reproduction and Production Traits and Their Genetic Potential in Thailand. Iowa State University Press, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.