Blau, Joseph L., author
Prentice-Hall, 1965
Buku Teks
Blau, Joseph L., author
Prentice-Hall, 1958
Buku Teks
Klesner, Joseph L., author
McGrawHill education, 2014
Buku Teks
Ministerio das Relacoes Exteriores do Brazil , 1976
Buku Teks
Morrison, Tony, author
Vintage Books, 2003
Buku Teks