Mazrui, Ali Al Amin
The Africans : a triple heritage
Little, Brown & Co., 1986
 Buku Teks
Murdock, George Peter
Africa
McGraw-Hill, 1959
 Buku Teks
Murdock, George Peter
Africa
McGraw-Hill, 1959
 Buku Teks
Nielsen, Waldemar A.
Africa
Atheneum, 1966
 Buku Teks
Africa
edited by Phillis M. Martin and Patrick O'Meara
Indiana University Press, 1995
 Buku Teks