Cita APA (7th ed.)
Morris, H., & Gallacher, L. ITIL Foundation Exam Study Guide. Sybex ; Wiley.
Cita Chicago (17th ed.)
Morris, Helen, i Liz Gallacher. ITIL Foundation Exam Study Guide. Hoboken, EUA : Chichester, Inglaterra: Sybex ; Wiley.
Cita MLA (9th ed.)
Morris, Helen, i Liz Gallacher. ITIL Foundation Exam Study Guide. Sybex ; Wiley.
Atenció: Aquestes cites poden no estar 100% correctes.