Arnold, Dieter
Princeton University Press, 2003
Buku Referensi
Bone, Robert G.
Littlefield, Adam, 1957
Buku Teks
edited by John Miksic
Archipelago Press, [date of publication not identified]
Buku Teks
Maine, Henry Sumner, 1822-1888
Everyman's Library, 1972
Buku Teks
Caldwell, Wallace Everett
Holt, Rinehart and Winston, 1963
Buku Teks