1. Chromeextension://efaidnbmnnnibpcajpcglclefindmkaj. http://www.jiwaji.edu/pdf/ecourse/env_science/EMS%20Audit%20and%20mgmt%20review.pdf
2. efaidnbmnnnibpcajpcglclefindmkaj. https://www.iso.org/files/live/sites/isoorg/files/store/en/PUB100323.pdf
3. https://app.croneri.co.uk/topics/ems-standards/indepth
4. https://app.croneri.co.uk/topics/environmental-performance-evaluation-epe/indepth#:~:text=EPE%20is%20an%20ongoing%20process,tracking%20performance%20trends%20over%20time.
5. https://asq.org/quality-resources/environmental-management-system