Step 1: Follow the guidelines for an edited book on page 15 of the handbook
Step 2: Add ebook in square brackets after the title but before the full stop
Step 3: Put Available from followed by the URL/web address
Step 4: Put accessed and the date of access in square brackets.
e.g.
Collings, D.G. and Wood, G. (eds.) (2009) Human resource management: a critical approach [ebook]. Abingdon: Routledge. Available from https://www-dawsonera-com.proxy.library.lincoln.ac.uk/readonline/9780203876336 [accessed 16 May 2018].
See Harvard Referencing Guide.