“Respon Pemberian Ekstrak Tomat Dan Waktu Fermentasi Terhadap Konsetrsi Kalium Pupuk Cair Limbah Tahu”. Proceeding National Conference : Education, Social, Science, and Humaniora, vol. 2, no. 1, Jan. 2021, pp. 89-93, https://journal-center.litpam.com/index.php/essh/article/view/355.