Jacob, M. R., Y. W. Putri, and S. O. Sihombing. “Predicting Green Product Purchase: Applying a Cognitive-Affective-Behavior Hierarchy”. Jurnal Siasat Bisnis, vol. 24, no. 2, July 2020, pp. 87-113, doi:10.20885/jsb.vol24.iss2.art1.