Wiyono, H. and Putra, P.P. 2023. The effect of breathing exercises on the anxiety level of preoperative patients in the Dahlia room, dr. Doris Sylvanus Palangka Raya: The effect of breathing exercises on the anxiety level of preoperative patients in the Dahlia room, dr. Doris Sylvanus Palangka Raya. Jurnal Forum Kesehatan : Media Publikasi Kesehatan Ilmiah. 12, 2 (Feb. 2023), 51–56. DOI:https://doi.org/10.52263/jfk.v12i2.123.