2012. Effect of Ammonium Sulphate on the Sporulation of Bacillus thuringiensis subsp. aizawai SN2 (a Local Isolate) during Batch Fermentation. Jurnal Teknologi (Sciences & Engineering). 39, 1 (Jan. 2012), 53–60. DOI:https://doi.org/10.11113/jt.v39.455.