↑ Different Types of Essential Oil Diffusers, http://www.etso-net.org/different-types-of-essential-oil-diffusers/ ↑ University of Minnesota, Kate Maher, RN, BSN, How can I inhale essential oils? https://www.takingcharge.csh.umn.edu/explore-healing-practices/aromatherapy/how-do-i-choose-and-use-essential-oils ↑ England, A. (2000).