Keene, Donald, author
Tuttle, 1976
Buku Teks
Raaflaub, Kurt A., author
Wiley Blackwell, 2013
Buku Teks
Stephens, Donald.
Twayne Publishers, 1966
Buku Teks
Australian War Memorial and Australian Government Publishing Service, 1971
Buku Teks
Matthews, Donald R.
The University of North Carolina Press, 1960
Buku Teks