R. Yenrina, D. Andhika Permata, D. Rasjmida, and R. Tayandi, “In Vitro Protein Digestibility and Physical Properties of Instant Teh Talua Dried by Spray Dryer”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 6, no. 1, pp. 84–87, Feb. 2016.