Baran, Stanley J.
Wadsworth and Cengage Learning, 2012
Buku Teks SO
Holmes, David
Sage, 2005
Buku Teks
Andersen, Kenneth E.
Cummings Publishing, 1972
Buku Teks SO
Griffin, E.M.
Mc Graw Hill, 2003
Buku Teks SO
Griffin, E.M.
McGraw-Hill, 2012
Buku Teks SO