In the citation, it is the authors of the chapter that are cited and the book editors are included in the reference, eg.
Wharrad et al. (2020) focus on the development of short, self-contained, digital learning such as this referencing package.
The template below shows how references are constructed.
Chapter author, initial (including multiple chapter authors) … (year of publication) … Chapter Title … In … Author, initial (including multiple authors) (eds.) … Title of book … Place published: … Publisher
Wharrad, H., Windle, R. and Taylor, M. (2020) Designing digital education and training for health. In Konstantinidis, S.Th., Bamidis, P.D. and Zary, N. (eds.) Digital Innovations in Healthcare Education and Training. London: Elsevier.