Ucal, Meltem, and Simge Günay. “Perceived Happiness, Perceived Trust and Perceived Income Levels: The Case of the Reunified Germany”. Panoeconomicus 66, no. 2 (March 25, 2018): 219–239. Accessed January 18, 2025. https://mail.panoeconomicus.org/index.php/jorunal/article/view/458.