Abd Razak, N. H. .; Mohd Shukori, N. W. .; Ku Hamid, K. H. . Elemental Analysis of Chitin from Extraction of Different Ages of Leucaena Leucephala With Hydrochloric Acid. J. Adv. Res. App. Sc. Eng. Tech. 2020, 16, 20-25.