Willrich, Mason
The Free Press, 1975
Buku Teks
Willrich, Mason
The Free Press, 1975
Buku Teks
Barnes, James F., author
St. Martin`s Press, 1980
Buku Teks
Rourke, John T., author
McGraw-Hill, 2001
Buku Teks
Kegley, Charles W. (Charles William), Jr., author
Wadsworth and Cengage Learning, 2013
Buku Teks