Cita APA (7a ed.)

Morris, H., & Gallacher, L. (2012). ITIL foundation exam study guide. Wiley.

Cita Chicago Style (17a ed.)

Morris, Helen, y Liz Gallacher. ITIL Foundation Exam Study Guide. Chichester, U.K.: Wiley, 2012.

Cita MLA (9a ed.)

Morris, Helen, y Liz Gallacher. ITIL Foundation Exam Study Guide. Wiley, 2012.