Hemphill, B. (2020) Occupational therapy and spirituality. London: Routledge.
Novelline, R.A. and Squire, L.F. (2018) Squire's fundamentals of radiology. 7th edn. Massachusetts: Harvard University Press.
You should use Davey et al., 2015 in your citation but list all of the authors in your reference list. For example: Citation: Davey et al. (2015) discuss the mechanisms of antibacterial drugs....
Davey, P., Wilcox, M.H, Irving, W. and Thwaites, G. (2015) Antimicrobial chemotherapy. 7th edn. Oxford: Oxford University Press.
You need to use the details of the author of the specific chapter you are using in both the citation in your text and in your reference list. If you have used more than one chapter from the same book, you would have two different citations and references.
Black (2019) discusses stereotyping and prejudice.
In this example, Roxie Black is the author of the chapter that is being cited in this assignment.
Black, R.M. (2019) 'Culture, diversity and culturally effective care' in B.A. Boyt Schnell and G. Gillen (eds) Willard and Spackman's occupational therapy. 13th edn. London: Wolters Kluwer, pp. 223-239.
The author of the chapter that is cited in the example above is listed as the author in the reference list. The full reference for a chapter in an edited book also includes the name(s) of the editor(s) of the whole book, title, publisher etc. The page numbers of the chapter that is cited in the assignment are listed at the end.