Noorhidayah, R., M. B. Musthafa, 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”. Jurnal Ilmu Tanah Dan Lingkungan, Vol. 23, no. 1, Feb. 2021, https://journal.ipb.ac.id/index.php/jtanah/article/view/33541.