Dharmawati, S., Gunawan, A., Pardede, A., & Sjofjan, O. (2025). Characteristics of Natural Collagen of Freshwater Snail Flesh (Pomacea paludosa) Extracted with Bromelain Enzyme and Acid-Hydro-Extraction Method. Tropical Journal of Natural Product Research (TJNPR), 9(3), 933-941. https://doi.org/10.26538/tjnpr/v9i3.7