Fadhilah, H., and D. Indrawati. “Analisis Tingkat Kebahagiaan Pensiunan: Studi Kasus IFLS 2007 Dan 2014”. Educationist: Journal of Educational and Cultural Studies, vol. 2, no. 1, July 2023, pp. 151-6, https://jurnal.litnuspublisher.com/index.php/jecs/article/view/108.