Stephan, David (Personal Name)

Levina, D. M. Using Minitab with Basic bus. stat., c1984: t.p. (David Stephan, Baruch Col., City Univ. NY)

Even you can learn statistics, c2010: ECIP t.p. (David F. Stephan)

Statistics for managers using Microsoft Excel, [2014]: t.p. (David F. Stephan) p. 8 (is an independent instructional technologist; was an instructor/lecturer of Computer Information Systems at Baruch College (City University of New York) for over 50 years)