Tarigan, Gunawan, 		Arthana, I, AND 		Pebriani, Dewa Ayu.
" Effect of Giving Different Doses of Vitamin E in Feed to the Level of Gonad Maturity of Tilapia (Oreochromis niloticus)" <em>Advances in Tropical Biodiversity and Environmental Sciences</em> [Online], Volume 5 Number 2 (15 August 2021)