NANSU, Worraphol, Passarawan CHAIWUT, Sukunya ROSS, Gareth ROSS, Nungruthai SUPHROM, and Sararat MAHASARANON. 2021. ā€œDevelopments of Biodegradable Polymer Based on Polylactic Acid (PLA) With Natural Color Extracts for Packaging Film Applicationsā€. Journal of Metals, Materials and Minerals 31 (3). Bangkok, Thailand:127-33. https://doi.org/10.55713/jmmm.v31i3.1147.