There does appear to be an International Centre of Holistic Aromatherapy hailing from Brisbane, Australia; however, the entity does not seem inclined to host a Website that I can find.
Additionally, someone named Salvatore Battaglia seems partnered to some degree with it.
This is all I can offer at the present.
Battaglia Complete Guide to Aromatherapy Part 1 (Japanese)
This new exciting book written in Japanese is Part 1 of 2 and includes the following chapters: Developing a Holistic Framework for the Practice of Aromatherapy History of Aromatherapy What are Essential Oils? Methods of Essential Oil Extraction Quality Control and Quality Assurance Essential Oil Safety The Essential Oils Exotic Essential Oils Vegetable Oils Methods of Administration…
The Complete Guide to Aromatherapy – second edition