N. Rizkalla and T. P. Erhan, “Sustainable Consumption Behaviour in The Context of Millennials in Indonesia – Can Environmental Concern, Self-efficacy, Guilt and Subjective Knowledge Make a Difference?”, Manag: J. Sustain. Bus. Manag. Solut. Emerg. Econ., vol. 25, no. 3, pp. 43–54, Dec. 2020.