edited b: Wallace R. Blischke, D.N. Prabhakar Murthy
John Wiley & Sons, 2003
Buku Teks SO
National Bureau of Economic Reserach, 1947
Buku Teks
edited by Lori L. Driscoll, W. Bede Mitchell
Routledge, 2009
Buku Teks
edited by Ron Zemke and John A. Woods
American Management Association, 1998
eBooks
edited by Roodney A. Ellis
Routledge, Taylor & Francis Group, 2009
Buku Teks SO