Suryanti; Indrati, R.; Irianto, H. E.; Marseno, D. W. Comparison Study on the Extraction of Gelatin from Nila Fish (Oreochromis Nilotichus) Skin Using Acetic Acid and Citric Acid. Pak. J. Nutr. 2016, 15 (8), 777–783. https://doi.org/10.3923/pjn.2016.777.783.