Nisa, H. K., and W. Ernawati. “The Effect of Lavender Aromatherapy on the Frequency of Decreasing Emesis Gravidarum in the 1st Trimester Pregnant Women ”. Science Midwifery, Vol. 11, no. 4, Oct. 2023, pp. 653-9, doi:10.35335/midwifery.v11i4.1346.