Lisansky, Judith
Westview Press, 1990
Buku Teks
Harrison, John Armstrong, author
University of Florida, 1953
Buku Teks
Ministerio das Relacoes Exteriores do Brazil , 1976
Buku Teks
Baer, Werner, author
Frederick A. Praeger, 1995
Buku Teks
Cole, John W., author
Academic Press, 1974
Buku Teks