NoorhidayahR., Musthafa M. B., and Sisno, “Fourier Transform Infrared (FTIR) Spectroscopy of Humic Acid from Chicken Manure Compost with Different Biodecomposers: Spectroskopi Fourier Transform Infrared (FTIR) Asam Humat dari Kompos Kotoran Ayam dengan Biodekomposer Berbeda”, J. Il. Tan. Lingk., vol. 23, no. 1, pp. 38-43, Apr. 2021.