Employee rights versus the first amendment
 Artikel Jurnal
Shiffrin, Steven H.
The First Amendment : cases, comments, questions
West, 2011
 Buku Teks SO
Gordon, Robert Aaron
Business leadership in the large corporation
The Brookings Institution, 1945
 Buku Teks
Hammer, Michael, 1948-2008
Reengineering the corporation : a manifesto for business revolution
Harper Collins, 2003
 Buku Teks SO
Konvitz, Milton Ridvas, 1908-2003
First amendment freedoms : selected cases on freedom of religion, speech, press, assembly
Cornell University Press, 1963
 Buku Teks SO