Fairuza, Filda, et al. “Effectiveness of Using Lemon Aromatherapy to Reduce the Frequency of Nausea and Vomiting in Pregnant Women in the First Trimester”. Jurnal Biologi Tropis, vol. 24, no. 3, Aug. 2024, pp. 717-24, doi:10.29303/jbt.v24i3.7496.