London, Kurt
Macmillan, 1947
Buku Teks
Kegley, Charles W. (Charles William), Jr., author
Wardsworth, 2010
Buku Teks
Rourke, John T., author
McGraw-Hill, 2010
Buku Teks
Andrew Hurrell, Ngaire Woods, Satria Utama S., Diana Arimbi
Fakultas Ekonomi UI, 2001
Buku Teks
edited Steven L. Spiegel
St. Martin's Press, 1981
Buku Teks