Morris, H., & Gallacher, L. (2012). ITIL foundation exam study guide. Wiley.
Chicago-čujuhus (17. p.)Morris, Helen, juo Liz Gallacher. ITIL Foundation Exam Study Guide. Chichester, U.K.: Wiley, 2012.
MLA-čujuhus (9. p.)Morris, Helen, juo Liz Gallacher. ITIL Foundation Exam Study Guide. Wiley, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.