Nikmatul, Khoiriyah, Anindita Ratya, Hanani Nuhfil, and Muhaimin Abdul Wahib. 2020. “The Analysis Demand for Animal Source Food in Indonesia: Using Quadratic Almost Ideal Demand System”. Business: Theory and Practice 21 (1):427-39. https://doi.org/10.3846/btp.2020.10563.