BCS, The Chartered Institute for IT, ebrary, Inc, & Brewster, E. (2012). IT service management: A guide for ITIL Foundation Exam candidates (2nd ed.). British Informatics Society Ltd..
Lua i Stíl Chicago (17ú heag.)BCS, The Chartered Institute for IT, Inc ebrary, agus Ernest Brewster. IT Service Management: A Guide for ITIL Foundation Exam Candidates. 2nd ed. Swindon, U.K.: British Informatics Society Ltd., 2012.
Lua MLA (9ú heag.)BCS, The Chartered Institute for IT, et al. IT Service Management: A Guide for ITIL Foundation Exam Candidates. 2nd ed. British Informatics Society Ltd., 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.