References

"NAHA Blog." National Association for Holistic Aromatherapy. Susan Stype and et al, Directors. 2020.

"PubMed Central." U.S. National Library of Medicine, National Center For Biotechnology Information. 5 October 2020. Bethesda, MD. 
​            ​   https://www.ncbi.nlm.nih.gov/pmc/

Robbins, Wendy. "Essential Oil Profiles." Aroma Web. 2020. www.aromaweb.com.

Tisserand, Robert and et al. "The Blog." Tisserand Institute, 2020. https://tisserandinstitute.org.