Said, Muhammad Irfan, Effendi Abustam, Abd Wahid Wahab, Sartini, and Amriana Hifizah. 2015. “Chemical Characteristics of Collagen Extract from Scapula of Bali Cattle (Os Scapula) Produced Using Different Extractant”. Pakistan Journal of Nutrition 14 (3): 174–179. https://doi.org/10.3923/pjn.2015.174.179.