Rourke, John T.
McGraw-Hill, 2010
Buku Teks
Kegley, Charles William, Jr.
St. Martin`s Press, 1997
Buku Teks
Lerche, Charles O., Jr.
Oxford University Press, 1956
Buku Teks
Andrew Hurrell, Ngaire Woods, Satria Utama S., Diana Arimbi
Fakultas Ekonomi UI, 2001
Buku Teks
Kalijarvi, Thorsten V.
Thomas Y. Crowell, 1954
Buku Teks