By Riis, Jabob A.. New York Hill and Wang 1957 . 231 p.
By Apple, Michael W.. Barcelona Paidós 1989 . 218 p.
By Sirvent, María Teresa. Madrid Niño y Dávila 1999 . 295 p. 849529401X
By Nda, Paul. Paris Harmattan 1987 . 222 p.
By Praxedes, Walter. Sao Paulo Àtica 1997 . 88 p. , Com suplemento o mercosul em números, p.65 8508047215
By Briand, Jean Pierre. Paris Hatier 1980 . 128 p. 2218053861
London Macmillan 1991 . 221 p. 0333460383
By Sharpe, Sue. Middlesex Penguin 1976 . 328 p. 0 14 02 1953 6
By Ianni, Octavio. São Paulo Editora Brasiliense 1987 . 356 p.