Purba, W., 		Syahputri, Y., 		Lubis, N., 		Nasution, G., 		Setiyawati, D., & 		Sembiring, F.
2025 Jun 10.  Evaluation of the potential of purple eggplant peel extract (Solanum melongena L.) as a pH indicator for bacterial growth. Jurnal Biologi Udayana. [Online] 29:1