Buttle, F. and Maklan, S. (2015) Customer Relationship Management: Concepts and Technologies. Third edition. London: Routledge, Taylor & Francis
Carbery, R. and Cross, C. (eds.) (2015) Human Resource Development: A Concise Introduction [online] London: Palgrave. available from <https://ebookcentral.proquest.com/lib/coventry/detail.action?docID=4762925>