Junior, M.Z. et al. 2007. Effect of exposure time of pregnant females guppies, Poecilia reticulata Peters, in 17a-methyltestosterone solution on sex ratio of their offsprings. Jurnal Akuakultur Indonesia. 1, 1 (May 2007), 47–54. DOI:https://doi.org/10.19027/jai.1.47-54.