Arfah, H., A.K. Kadriah, and O. Carman. 2007. “Effect of 17α-Methyltestosterone Hormone Manipulation in Various Water Temperatures on Sex Ratio of Guppy (Poecilia Reticulata Peters)”. Jurnal Akuakultur Indonesia 4 (1): 37-40. https://doi.org/10.19027/jai.4.37-40.