Bays, Alfred W.
Macmillan, 1931
Buku Teks
Redmond, Peter W.D.
The M & E Handbook Series, 1993
Buku Teks SO
Bond, Helen J.
Blackstone, 1990
Buku Teks SO
Upp, Robert D.
Harcourt, Brace Jovanovich Legal and Professional Publications, 1984
Buku Teks
Presser, Stephen B.
Thomson/West, 2010
Buku Teks SO