Shimko, Keith L., 1962-
Wadsworth and Cengage Learning, 2013
Buku Teks
Kegley, Charles W. (Charles William), Jr.
St. Martin's Press, 1995
Buku Teks
Kegley, Charles W. (Charles William), Jr.
St. Martin's Press , 1995
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selected by a committee of the American Economic Association
The Blakiston , 1950
Buku Teks
Zeff, Stephen A.
McGraw-Hill , 1994
Buku Teks