The Harvard Law Review Association, 1978
Buku Teks
edited by Jeffrey J. Magnavita
John Wiley & Sons, 2003
Buku Teks
CRC Press, Taylor & Francis Group, 2011
Buku Referensi
Coombs, William E., author
McGraw-Hill, 1984
Buku Referensi
prepared under the editorial supervision of In Plain English, Inc.
Macmillan, 1996
Buku Referensi