editor, John DeFrancis
Allen & Unwin, 1997
Buku Referensi
Nash-Williams, A.H.
London MacMillan 1934
Buku Teks
London, 1982
Buku Referensi
Fowler, H. W. (Henry Watson), 1858-1933, author
New York Oxford University Press 1965
Buku Referensi
Chapman, Robert L., author
London Pan Books 1988
Buku Referensi