Turville-Petre, Thorlac
Blackwell Publishing, 2007
Buku Teks SO
Wiley-Blackwell, 2013
Buku Teks SO
Salzman, L.F.
Oxford University Press, 1955
Buku Teks SO
Coote, Stephen
Penguin Group, 1988
Buku Teks SO
Mosse, Fernand
The Johns Hopkins Press, 1952
Buku Teks