Westmacott-Brown, N. (2019). Breathwork: Use the power of breath to energize your body and focus your mind. Dorling Kindersley Limited.
Chicago-referens (17:e uppl.)Westmacott-Brown, Nathalia. Breathwork: Use the Power of Breath to Energize Your Body and Focus Your Mind. London: Dorling Kindersley Limited, 2019.
MLA-referens (9:e uppl.)Westmacott-Brown, Nathalia. Breathwork: Use the Power of Breath to Energize Your Body and Focus Your Mind. Dorling Kindersley Limited, 2019.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.