Artikel Jurnal
edited by L.S. Blake
Butterworth, 1994
Buku Referensi
edited by E.A. Brandes and G.B. Brook
Butterworth, 1992
Buku Referensi
Oxley, Jolyon, author
Faber and Faber, 1991
Buku Referensi
edited by Colin J. Smithells and assistant editor, Eric A. Brandes
Butterworth, 1976
Buku Teks