Schnitzer, Martin C.
Contemporary government and business relations / Martin C. Schnitzer
Houghton Mifflin, 1987
 Buku Teks SO
Basiang, Martin
The contemporary law dictionary / Martin Basiang
Red & White Publishing, 2009
 Buku Referensi
Boone, Louis E.
Contemporary business
Dryden Press, 1996
 Buku Teks
Boone, Louis E.
Contemporary business
Dryden Press, 1990
 Buku Teks
Allen, Robert E.
Contemporary labor relations
Addison-Wesley, 1983
 Buku Teks SO