Sumber:

• https://www.healthline.com/health/transcutaneous-electrical-nerve-stimulation-unit#function
• https://www.medicalnewstoday.com/articles/323632.php
• https://my.clevelandclinic.org/health/treatments/15840-transcutaneous-electrical-nerve-stimulation-tens
• https://www.nhs.uk/conditions/transcutaneous-electrical-nerve-stimulation-tens/