1. Educational Psychology;Hoy,2001
2. For Now and Forever: A Family Guide for Supporting the Social and Emotional Development of Infants and Toddlers;Mackrain,2009
3. Abnormal Psychology;Seligman,1999
4. Muscle Tension, Aches, and Pains—Anxiety Symptomshttps://www.anxietycentre.com/anxiety-disorders/symptoms/muscle-tension/
5. Chronic Pain | Anxiety and Depression Association of America, ADAAhttps://adaa.org/understanding-anxiety/related-illnesses/other-related-conditions/chronic-pain