Retni A, Abdullah FM. Effectiveness of the Stimulation of Endorphin, Oxytocin, and Serotonin (SPEOS) Method in Improving Sleep Quality among Postpartum Women: A Quasi-Experimental Study in Primary Maternal Healthcare in Gorontalo, Indonesia. J. Health Nutr. Res [Internet]. 2026 Aug. 1 [cited 2026 Aug. 6];5(2):1048-57. Available from: https://journalmpci.com/index.php/jhnr/article/view/1469