Pitriani, Risa. 2019. “Lemon Aroma Therapy For Overcoming Nausea Vomiting At First Trimester Pregnancy Clinic Primary Afiyah In Pekanbaru: Lemon Aroma Therapy For Overcoming Nausea Vomiting At First Trimester Pregnancy Clinic Primary Afiyah In Pekanbaru”. Journal of Midwifery and Nursing 2 (1):126-29. https://www.ejournal.iocscience.org/index.php/JMN/article/view/450.