Kapsali, Maria, Hulton, Dorinda. "Yoga and Actor Training Workshop Approach 4: four factors of voice and speech." The Routledge Performance Archive. : Taylor and Francis, 2016. Date Accessed 4 Jun. 2023 https://www.routledgeperformancearchive.com/multimedia/video/yoga-and-actor-training-workshop-approach-4
Kapsali, M., Hulton, D.(2016). Yoga and Actor Training Workshop Approach 4: four factors of voice and speech. In The Routledge Performance Archive. : Taylor and Francis. Retrieved 4 Jun. 2023, from https://www.routledgeperformancearchive.com/multimedia/video/yoga-and-actor-training-workshop-approach-4
Kapsali, M., Hulton, D. 2016, 'Yoga and Actor Training Workshop Approach 4: four factors of voice and speech' in Routledge Performance Archive, Taylor and Francis, viewed 4 June 2023, <https://www.routledgeperformancearchive.com/multimedia/video/yoga-and-actor-training-workshop-approach-4>
