Efendi, S., and P. Sihombing. “Sentiment Analysis of Food Order Tweets to Find Out Demographic Customer Profile Using SVM”. MATRIK : Jurnal Manajemen, Teknik Informatika Dan Rekayasa Komputer, Vol. 21, no. 3, July 2022, pp. 583-94, doi:https://doi.org/10.30812/matrik.v21i3.1898.