Kasiyati et al. 2016. Roles of Curcumin and Monochromatic Light in Optimizing Liver Function to Support Egg Yolk Biosynthesis in Magelang Ducks. International Journal of Poultry Science. 15, 10 (Sep. 2016), 414–424. DOI:https://doi.org/10.3923/ijps.2016.414.424.