Thongnopphakhun, A., W. Trakulkasemsuk, and T. Bunsom. “Materialism Construction: Keyword Analysis of Bruno Mars’ Song Lyrics”. Journal of Studies in the English Language, vol. 14, no. 2, Aug. 2019, pp. 49-90, https://so04.tci-thaijo.org/index.php/jsel/article/view/167293.