Kalvāns, Ēriks. “Options of Using Oxford Happiness Survey of Latgale Inhabitants Happiness Structural Studies”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 3 (May 17, 2015): 369–378. Accessed December 22, 2024. https://journals23.rta.lv/index.php/SIE/article/view/368.