Gosak, Lucija, Leona Cilar Budler, Roger Watson, and Gregor Štiglic. Napredne Kvantitativne Raziskovalne Metode V Zdravstveni Negi. University of Maribor Press, 2025. Accessed March 6, 2026. https://press.um.si/index.php/ump/catalog/book/945.