Griffiths, R. (2015). Service offerings and agreements: A guide for ITIL exam candidates (2.). BCS.
Chicago-stil citatGriffiths, Richard. Service Offerings and Agreements: A Guide for ITIL Exam Candidates. 2. UK: BCS, 2015.
MLA-referensGriffiths, Richard. Service Offerings and Agreements: A Guide for ITIL Exam Candidates. 2. BCS, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.