American slavery : the question of resistance edited by John H. Bracey, Jr., August Meier, Elliott Rudwick.    Belmont, Calif. :  Wadsworth Publishing,  c1971 . 202 s.

Black bourgeoisie : the rise of a new middle class in the United States / E. Franklin Frazier.    London :  Collier Books,  1962 . 222 s.

Black masters : a free family of color in the old South Michael P. Johnson and James L. Roark.    New York ; London :  W.W. Norton & Co.,  1984 . xvi, 422 s.

David Walker's Appeal, in four articles ; together with a preamble, to the coloured citizens of the world, but in particular, and very expressly, to those of the United States of America edited and with an introduction by Charles M. Wiltse.    New York :  Hill and Wang,  [c1965] . xii, 78 s.

The arrogance of race : historical perspectives on slavery, racism, and social inequality George M. Fredrickson.    Middletown :  Wesleyan University Press,  c1988 . x, 291 s.