Burhan, A. H. (2019) “Potential of Beetroot (Beta vulgaris L.) and Purple Sweet Potato (Ipomoea batatas L.) as Natural Indicators of Formalin in Food”, JURNAL ILMU KESEHATAN BHAKTI SETYA MEDIKA, 4, pp. 7-13. doi: 10.56727/bsm.v4i.67.