C. Lisnahan, W. Wihandoyo, Z. Zuprizal, and S. Harimurti, “INTESTINAL MORPHOLOGY OF NATIVE CHICKENS AT 20 WEEKS-OLD SUPPLEMENTED BY DL-METHIONINE AND L-LYSINE HCL INTO FEED”, JTAST, vol. 1, no. 1, pp. 14-21, Jul. 2019.