Donnelly, Thomas C.
The University of New mexico Press, 1953
Buku Teks
Pick, James B.
Westview , 1989
Buku Referensi
Vaillant, George C.
Penguin Books, 1944
Buku Teks
Myers, Charles Nash
Princeton University , 1965
Buku Teks
Castillo, Bernal Diaz del
H. Wolf, 1956
Buku Teks