Mamay, M., E. Ernawati, and A. Nurisani. “Potential of Sappan Wood, Purple Cabbage and Beetroot Extract in Sperm Staining”. Indonesian Journal of Medical Laboratory Science and Technology, vol. 5, no. 2, Aug. 2023, pp. 100-11, doi:10.33086/ijmlst.v5i2.3961.