TD Magazine Article Credibility In Training Part V Doing It Right Can Sometimes Be Pretty Risky WD By William A. Deterline 0 Comments Bookmark Main Site Sign in Page Don't have an ATD account? Don't have an ATD account? Forgot your Password? Already an ATD customer without a web account? Institutional subscriber? Click here to sign in. Share Member-Only Content Part IV. Discusses how to achieve credibility in training. Theorems; Concept of levels. You've reached ATD member-only content. Sign in below or join ATD to continue. Sign In