Sofyaningsih, Mira, Dr Sugiyono, and Dwi Setyaningsih. 2011. “RETENSI VANILIN DAN PERUBAHAN WARNA EKSTRAK PEKAT VANILI SELAMA PENYIMPANAN [Vanillin Retention and Color Changes of Concentrated Vanilla Extract During Storage]”. Jurnal Teknologi Dan Industri Pangan 22 (2), 110. https://journal.ipb.ac.id/index.php/jtip/article/view/4248.