Bone, Robert G.
Littlefield, Adam, 1957
Buku Teks
edited by John Miksic
Archipelago Press, [date of publication not identified]
Buku Teks
Caldwell, Wallace Everett
Holt, Rinehart and Winston, 1963
Buku Teks
Beck, Roger
Blackwell Publishing, 2007
Buku Teks
Forbes, R.J.
Leiden E.J. Brill 1965
Buku Teks