Mosse, Fernand
The Johns Hopkins Press, 1952
Buku Teks
Whitla, William
Wiley-Blackwell, 2010
Buku Referensi
Swets & Zeitlinger B.V., 1994
Majalah, Jurnal, Buletin
Turville-Petre, Thorlac
Blackwell Publishing, 2007
Buku Teks
Coote, Stephen
Penguin Group, 1988
Buku Teks