Ivory, Arthur E.E.
Whitcoulls Publishers, 1982
Buku Referensi
Colin, Fong
Australian Law Librarians` Group, 1988
Buku Teks
Robillard, Walter G.
John Wiley & Sons, 2014
Buku Teks
Paxton, John
J.M. Dent & Sons, 1992
Buku Referensi
Schwartz, Robert J.
Crowell , 1955
Buku Referensi