Ponco, K. Y. Y., Pajas, A. M. G. A., & Rayos, A. A. (2021). Ultrasonographic features of the uterus and ovaries in Holstein-Sahiwal crossbred dairy heifers at different phases of the estrous cycle. The Philippine Journal of Veterinary Medicine.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ponco, Kristine Ysabel Y., Arville Mar Gregorio A. Pajas, و Antonio A. Rayos. "Ultrasonographic Features of the Uterus and Ovaries in Holstein-Sahiwal Crossbred Dairy Heifers at Different Phases of the Estrous Cycle." The Philippine Journal of Veterinary Medicine 2021.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ponco, Kristine Ysabel Y., et al. "Ultrasonographic Features of the Uterus and Ovaries in Holstein-Sahiwal Crossbred Dairy Heifers at Different Phases of the Estrous Cycle." The Philippine Journal of Veterinary Medicine, 2021.