HERMAWAN, AGUS, 		SABARUDDIN, SABARUDDIN, 		MASRI, MASRI, 		HAYATI, RENIH, AND 		WARSITO, WARSITO.
" Perubahan Titik Muatan Nol dan Muatan Negatif  Abu Terbang Batubara akibat Penambahan Kotoran Ayam dan Waktu Inkubasi" <em>Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology)</em> [Online], (29 October 2014)