Rudden, Bernard
Clarendon Press Oxford, 1995
Buku Teks
edited by Anthony Milner and Mary Quilty
Oxford University Press, 1997
Buku Teks
Palacio do Itamaraty 2000,
Buku Referensi
Hewett, Dorothy, author
Currency Press, 1980
Buku Teks
edited by Mahbub ul Haq, Inge Kaul, Isabelle Grunberg
Oxford University Press, 1996
Buku Teks