PAYNE, Adrian - FROW, Pennie. Strategic Customer Management [elektronický zdroj]. Cambridge : Cambridge University Press, 2013. 1 online zdroj (548 s.). Available on Internet: <http://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=533819> ISBN 1107333199.