Sitepu, K. M. “PENENTUAN KONSENTRASI RAGI PADA PEMBUATAN ROTI (Determining of Yeast Concentration on Bread Making)”. Jurnal Penelitian Dan Pengembangan Agrokompleks, vol. 2, no. 1, July 2019, pp. 71-77, https://journal-old.unhas.ac.id/index.php/jppa/article/view/6530.