Thornton, Richard C.
Sweet & Maxwell, 2012
Buku Teks
Gunadi
[publisher not identified], 2001
Buku Teks SO
Ryan, K.W.
Law Book Company, 1972
Buku Teks
technical editors, Pok Soy Yoong, Ng Keat Seng, Steven M. Timms
Lexis Nexis, 2011
Buku Referensi
Prentice-Hall, 1976
Buku Teks