Maqsood-ul-Haque, Suzihaque, and Nor Syazwani Md Shariffuddin. “Development of Biodegradable Food Packaging Incorporated With Pigment of Rose and Red Cabbage”. International Journal of Integrated Engineering, vol. 14, no. 5, Sept. 2022, pp. 188-97, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/11941.