Zander, Alvin
Making groups effective / Alvin Zanden
Jossey-Bass Publishers, 1994
 Buku Teks
Dawson, Robert MacGregor
The Government of Canada/ Robert MacGregor Dawsson
The Univ. of Toronto Press , 1959
 Buku Teks
Murray, John Edward
Murray on contracts
Michie, 1990
 Buku Teks SO
Knox, Frank M.
The knox standard guide to design and control of business forms
McGraw-Hill, 1965
 Buku Teks SO
Doren, Carl van
The great rehearsal : the story of the making and ratifying of the constitution of the United States
Time Reading Program, 1965
 Buku Teks SO