1. American Speech-Language-Hearing Association. Supply and Demand Resource List for Audiologists. In: http://www.asha.org/uploadedFiles/Supply-Demand-Audiology.pdf [9 September 2017]
2. Cambodian otology service – a fellowship with a difference;Clark;ENT News,2014
3. Developing World ENT. Guides: Open Access Atlas of Otolaryngology, Head & Neck Operative Surgery. In: https://www.entdev.uct.ac.za/guides/open-access-atlas-of-otolaryngology-head-neck-operative-surgery [25 September 2017]
4. Developing World ENT. Educational Material: Of Developing World Interest. In: http://www.entdev.uct.ac.za/education_material/of-developing-world-interest [25 September 2017]