Máchal, L., Jeřábek, S., Zatloukal, M., & Straková, E. (2004, February). Defective eggs and their relationship to egg yield, egg and body weight in hens of five original laying lines. Czech Journal of Animal Science.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Máchal, L., S. Jeřábek, M. Zatloukal, و E. Straková. "Defective Eggs and Their Relationship to Egg Yield, Egg and Body Weight in Hens of Five Original Laying Lines." Czech Journal of Animal Science Feb. 2004.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Máchal, L., et al. "Defective Eggs and Their Relationship to Egg Yield, Egg and Body Weight in Hens of Five Original Laying Lines." Czech Journal of Animal Science, Feb. 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.