Ellinger, E.P., author
Clarendon Press, 1994
Buku Teks
Sayers, R.S., author
Oxford University Press , 1967
Buku Teks
Poh, Chu Chai, author
LexisNexis, 2011
Buku Teks
Chorley, Lord, author
Sir Isaac Pitman & Sons, 1960
Buku Teks
Hamblin, Clive, author
Sweet & Maxwell, 1985
Buku Teks