For chapters of edited books the required elements for a reference are:
Denny, E. (2012) Experiencing and managing medically unexplained conditions: the case of chronic pelvic pain in women. In: C. Lloyd and T. Heller, eds. Long-term Conditions: Challenges in health and social care practice. London: Sage, pp. 37-49.
An in-text reference would only provide the author's name, not the editor's.