True State of the Differences Subsisting Between the Proprietors of Covent-Garden TheatreGeorge Colman, William PowellHäftad, 2017479 kr
Teacher Self-Supervision: Why Teacher Evaluation Has Failed and What We Can Do About itWilliam PowellHäftad, 2015319 kr
OIQ Factor: Raising Your School's Organizational Intelligence: How Schools Can Become Cognitively, Socially and Emotionally SmartOchan Kusuma-Powell, William PowellHäftad, 2013299 kr