Prentice-Hall, 1976
Buku Teks SO
Chommie, John C.
West Publishing, 1968
Buku Teks SO
Beattie, C.N.
Stevens & Sons Lim, 1957
Buku Teks
technical editors, Pok Soy Yoong, Ng Keat Seng, Steven M. Timms
Lexis Nexis, 2011
Buku Referensi
Ryan, K.W.
Law Book Company, 1972
Buku Teks SO