Sykes, Egerton
London, J.M. Dent and Sons
Buku Referensi
[publisher not identified], [date of publication not identified]
Buku Teks
Paxton, John
J.M. Dent & Sons, 1992
Buku Referensi
Browning, D. C.
J.M. Dent , 1951
Buku Referensi
edited by M. Cary
Clarendon Press, 1950
Buku Referensi