Agutter, C., & Villa, K. (2021). ITIL 4 Direct, Plan and Improve (DPI): Your companion to the ITIL 4 managing professional and strategic leader DPI certification ([First edition].). IT Governance Publishing.
Chicago Style (17th ed.) CitationAgutter, Claire, and Katie Villa. ITIL 4 Direct, Plan and Improve (DPI): Your Companion to the ITIL 4 Managing Professional and Strategic Leader DPI Certification. [First edition]. [Place of publication not identified]: IT Governance Publishing, 2021.
MLA (9th ed.) CitationAgutter, Claire, and Katie Villa. ITIL 4 Direct, Plan and Improve (DPI): Your Companion to the ITIL 4 Managing Professional and Strategic Leader DPI Certification. [First edition]. IT Governance Publishing, 2021.
Warning: These citations may not always be 100% accurate.