Rourke, John T.
McGraw-Hill, 2001
Buku Teks
Rourke, John T.
Brooks/Cole, 1986
Buku Teks
Rourke, John T.
McGraw-Hill, 2007
Buku Teks
Roskin, Michael G.
Pearson/Prentice Hall, 2004
Buku Teks
Kegley, Charles William, Jr.
St. Martin`s Press, 1997
Buku Teks