Calvocoressi, Peter
Longman, 1992
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
Cambridge University Press, 2003
Buku Teks