Lenk, John D., author
Prentice-Hall, 1978
Buku Referensi
Lee, Stuart D., author
Facet, 2002
Buku Teks
Sinclair, Ian R., author
Newnes Butterworth-Heinemann, 1994
Buku Teks
edited by Matt Bonass, Michael Rudd
Globe Law and Business, 2010
Buku Teks
edited by Joseph S. Wholey
Jossey-Bass Publishers, 1994
Buku Teks