Ketchum, Richard M.
American Heritage Publishing, 1960
Buku Teks SO
Catton, Bruce
Dell Publishing, 1960
Buku Teks SO
Quinn, Arthur Hobson
Irvington Publishers, 1943
Buku Teks SO
Crane, Stephen
Wilco Publishing House, 2005
Buku Teks SO
Roland, Charles P.
McGraw-Hill, 1991
Buku Teks SO