Reed, Thomas
Using consulting systems: business skills
[American Society for Training & Development Press, American Society for Training & Development Press], 2003
 eBooks
Weiss, Alan
Getting started in consulting
John Wiley & Sons, 2009
 Buku Referensi
Phillips, Jack J.
Performance analysis and consulting
[American Society for Training & Development Press;, ], 2000
 eBooks
Consultants and consulting organizations directory : a reference guide to concerns and individuals engaged in consultation for business, industry, and government
edited by Janice McLean
Gale Research, 1991
 Buku Referensi
Scott, Beverly
Consulting on the inside: a practical guide for internal consultants
American Society for Training & Development, 2011
 eBooks