Myers, Bernard S., author
McGraw-Hill, 1967
Buku Teks
Ministerio das Relacoes Exteriores do Brazil , 1976
Buku Teks
Mcinnes, Graham
Toronto The Macmillan Co of Canada Limited 1950
Buku Teks
Bushell, Stephen W., author
Wyman and Sons, 1906
Buku Teks
Harry N. Abrams, INC, 2001
Buku Teks