Safriyanto Dako, Fahrul Ilham, Nibras. K. Laya, Frida. M Yusuf. “NHERITANCE OF EXTERNAL GENETIC CHARACTERISTICS IN CHICKEN THROUGH TRIPLE CROSSING MODEL”. International Journal of Advanced Science and Technology, Vol. 29, no. 9s, Apr. 2020, pp. 549-58, http://sersc.org/journals/index.php/IJAST/article/view/13134.