Effectiveness of Ketapang (Terminalia cattapa L.) Extract Against Avian Pathogenic Eschericia coli (APEC) Infections in Layer Performance, Rachmawati, Kadek, Kurnijasanti Rochmah, Sabdoningrum Emy Koestanti, and Naw Sin War , Pharmacognosy Journal, June 2023, Volume 15, Issue 3, p.417-422, (2023)