Garner, Bryan A.
Oxford University Press, 1995
Buku Referensi
Squires, Lynn B.
West Publishing, 1982
Buku Teks
Nedzel, Nadia E.
Wolters Kluwer Law Business, 2008
Buku Teks
Neumann, Richard K.
Wolters Kluwer Law & Business, 2013
Buku Teks
Berch, Michael A.
West, 2010
Buku Teks