Sriyono, S., A. Febriangga, N. Velasari, and N. Fediyanto. “Instability Of The Stock Return On Food And Baverage Companies Listed In Indonesia Stock Exchange”. American Journal of Economics and Business Management, vol. 2, no. 1, Mar. 2019, pp. 50-60, doi:10.31150/ajebm.Vol2.Iss1.44.