Kusumawati, E., A. Matulessy, R. A. P. Rini, and A. Muhid. “Importance of Happiness and Meaningfulness of Work in Increasing Work Engagement of Millennial Generation in the Digital Age: Systematic Literatur Review”. Jurnal Psikologi Teori Dan Terapan, vol. 15, no. 01, Feb. 2024, pp. 16-31, doi:10.26740/jptt.v15n01.p16-31.