Zinn, Howard
HarperCollins Publishers, 2005
Buku Teks
Walker, Edward Everett, 1900-1974
Charles Scribner's Sons, 1943
Buku Teks
Boyd, Anne Morris
H.W. Wilson, 1949
Buku Teks
edited by Roy A. Grisham, Jr., Paul D. McConaughy
WM. H. Wise, 1966
Buku Referensi
Holloway, William Vernon
McGraw-Hill , 1951
Buku Teks