Putra, B. J. M., A. Helen, and A. R. Barakbah. “Rule-Based Sentiment Degree Measurement of Opinion Mining of Community Participatory in the Government of Surabaya”. EMITTER International Journal of Engineering Technology, Vol. 6, no. 2, Dec. 2018, pp. 200-16, doi:10.24003/emitter.v6i2.275.