Poltak Pardamean Simarmata, Doris Yolanda Saragih, Hengki Mangirng Parulian Simarmata. Green Material & Process and Green Packaging as Drivers of Tourists’ Sustainable Purchase Intention: Evidence from a PLS-SEM Study in Lake Toba, Indonesia. makreju [Internet]. 2026 Aug. 21 [cited 2026 Sep. 27];4(3):106-28. Available from: https://scientivapress.org/index.php/makreju/article/view/4450