Siagian, M., and E. Surya. “The Influence of Three Stage Fishbowl Decision Strategy on Students”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 34, no. 1, June 2017, pp. 8-15, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7479.