Rizkalla, Nosica, and Trihadi Pudiawan Erhan. “Sustainable Consumption Behaviour in The Context of Millennials in Indonesia – Can Environmental Concern, Self-Efficacy, Guilt and Subjective Knowledge Make a Difference?”. Management:Journal of Sustainable Business and Management Solutions in Emerging Economies, vol. 25, no. 3, Dec. 2020, pp. 43-54, doi:10.7595/management.fon.2020.0001.