“Effect of Ammonium Sulphate on the Sporulation of Bacillus Thuringiensis Subsp. Aizawai SN2 (a Local Isolate) During Batch Fermentation”. Jurnal Teknologi (Sciences & Engineering) 39, no. 1 (January 20, 2012): 53–60. Accessed September 20, 2026. https://journals.utm.my/jurnalteknologi/article/view/455.