„Dr. Cleland was among the first to see project management strategically as well as tactically, at the center of organizational competencies... It's hard to believe, but there was a time when it was new and unfamiliar. Dr. Cleland was a driving force behind the adoption of project management as a professional competency, and is a key contributor to the success of all organizations that use professional project management standards and methodologies today.“
— Gregory Balestrero
Balestrero cited in: G.R. Boyet & M. Maguire Kelly (2010) PMI Pays Tribute to Dr. David I. Cleland for a Lifetime of Achievement to Project Management and the Profession http://www.pmi.org/About-Us/Press-Releases/PMI-Pays-Tribute-to-Dr-David-I-Cleland.aspx. at pmi.org. 13 July 2010.