Pergamon Press, 2018
Majalah, Jurnal, Buletin
Jefferson, Michael
Pitman, 1992
Buku Teks SO
LaFave, Wayne R.
Thomson Reuters, 2010
Buku Teks SO
Fletcher, George P.
Oxford University Press, 2000
Buku Teks
Glazebrook, P.R.
Blackstones Press Ltd., 2000
Buku Teks