Asra, Ridho, Rusdi R, Indah Fitrina, and Nessa Nessa. “Application of Red Dragon Fruit Dyes As Staining in Histological Study”. Asian Journal of Pharmaceutical Research and Development 9, no. 6 (December 14, 2021): 48-55. Accessed February 9, 2023. https://ajprd.com/index.php/journal/article/view/1045.