2021. Effectivity of Essential Oil Diffuser Blend Aromatherapy for Decrease Morning Sickness in The First Trimester of Pregnancy in Wonokromo Surabaya. Indian Journal of Forensic Medicine & Toxicology. 15, 3 (May 2021), 2740–2745. DOI:https://doi.org/10.37506/ijfmt.v15i3.15722.