Souisa, C., and S. O. Batubara. “ Penerapan Teknik Relaksasi Napas Dalam Pada Pasien Dengan Pneumonia: Application of Deep Breathing Relaxation Techniques in Patients With Pneumonia ”. Jurnal Ilmiah Keperawatan (Scientific Journal of Nursing), vol. 11, no. 3, Oct. 2025, pp. 539-46, doi:10.33023/jikep.v11i3.2842.