Cook, Mary F.
The complete do-it-yourself personnel department : with model forms, checklists & sample manuals
Prentice-Hall, 1997
 Buku Referensi
Haner, F.T.
Business policy, planning, and strategy / by F.T. Haner
Winthrop Publisher, 1976
 Buku Teks
Knox, Frank M.
Design and control of business forms
McGraw-Hill, 1952
 Buku Teks
Aaker, Davis A.
Developing business strategies /Davis A. Aaker
John Wiley , 1984
 Buku Teks
Harvard business review on mergers and acquisitions
Harvard Business School Press, 2001
 Buku Teks SO