Kring, A.M. et al. (2012) Abnormal psychology. 12th ed., International student ed. Hoboken, N.J.: Wiley.
Morrison, V. and Bennett, P. (2017) An introduction to health psychology. Fourth edition. Harlow, United Kingdom: Pearson Education Limited. Available at: https://ebookcentral.proquest.com/lib/bangor/detail.action?docID=5175051.