Kutlu, Yusuf Arif, Ayten Çalık, and Emin Uğur Ulugergerli. “Placebo Effect of Gemstones”. JOURNAL OF AWARENESS 7, no. 3 (July 31, 2022): 87–95. Accessed May 5, 2024. https://journals.gen.tr/index.php/joa/article/view/1723.