edited Steven L. Spiegel
St. Martin's Press, 1981
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Vorkonk-Van Hoeve, 1976
Buku Teks
Calvocoressi, Peter
Longman, 1991
Buku Teks
Taylor, Phillip M., author
Routledge, 1997
Buku Teks
Wright, Robin B. 1948-
Tian Xia Wen Hua, 1993
Buku Teks