Lerche, Charles O., Jr., author
Oxford University Press, 1956
Buku Teks
Andrew Hurrell, Ngaire Woods, Satria Utama S., Diana Arimbi
Fakultas Ekonomi UI, 2001
Buku Teks
Kalijarvi, Thorsten V., author
Thomas Y. Crowell, 1954
Buku Teks
Kegley, Charles William, Jr., author
St. Martin`s Press, 1997
Buku Teks
by Steven L. Spiegel [and others]
Thomson Wadsworth, 2005
Buku Teks