I. Indah, D. Lestari, S. P. Lasenda, and R. S. E. Sitindaon, “Analysis of Antioxidant Activity of Ethanol Extracts of Cocoa Fruit Peel (Theobroma cacao L.) and Arabica Coffee Fruit Peel (Coffee arabica L.) with Maceration and Reflux Extraction Method”, J. Food Pharm. Sci, vol. 13, no. 3, pp. 296-303, Sep. 2025.