RahmaniahB. I., & KrisnatutiD. (2016). The Perception of Ageism, Generativity, and the Attainment of Developmental Tasks of Elderly Widowers and Widows in Bogor, West Java, Indonesia. Journal of Family Sciences, 1(1), 1-12. https://doi.org/10.29244/jfs.1.1.1-12