Guttmann, H. Peter
The international consultant
McGraw-Hill, 1976
 Buku Teks
Hunt, Alfred
The management consultant / Alfred Hunt
N.Y. John Wiley & Sons , 1977
 Buku Teks
Practicing organization development : a guide for consultant
edited by William J. Rothwell, Roland Sullivan, Gary N. McLean ; with a foreword by Kathleen D. Dannemiller and Robert W. Jacobs
Pfeiffer, 1995
 Buku Teks
Porteous, Murray
Occupational psychology
 Buku Teks
Christofer Chandra
Dampak hukum perubahan CV Tubagus Consultant menjadi PT Tubagus Consultant terhadap kontrak kerja yang masih berjalan = The legal impact of CV Tubagus Consultant changing into PT Tubagus Consultant on the ongoing contract
2014
 UI - Skripsi (Membership)