Pérez-Osorio, J., Cardona-Álvarez, J. A., Gómez-León, V. E., & Otero-Arroyo, R. J. (2016). Relationship between scrotal circumference and parameters of semen quality in male Guzerat Bulls from puberty to 36 months of age raised pasture in the savanah. Universidad Pedagógica y Tecnológica de Colombia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pérez-Osorio, Jair, José Alberto Cardona-Álvarez, Víctor Enrique Gómez-León, و Rafael José Otero-Arroyo. Relationship Between Scrotal Circumference and Parameters of Semen Quality in Male Guzerat Bulls from Puberty to 36 Months of Age Raised Pasture in the Savanah. Universidad Pedagógica y Tecnológica de Colombia, 2016.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Pérez-Osorio, Jair, et al. Relationship Between Scrotal Circumference and Parameters of Semen Quality in Male Guzerat Bulls from Puberty to 36 Months of Age Raised Pasture in the Savanah. Universidad Pedagógica y Tecnológica de Colombia, 2016.
