Simbolon, J. E., S. Isdadiyanto, and A. J. Sitasiwi. “The Effect of Nanochitosan Preparation of Neem Leaf (Azadirachta Indica) Ethanol Extract on the Liver Structure of White Rats (Rattus Norvegicus)”. International Journal of Health, Education & Social (IJHES), Vol. 5, no. 6, June 2022, pp. 21-31, doi:10.1234/ijhes.v5i6.237.