Clark, Robert C., author
Little, Brown, 1986
Buku Teks
Goode, Roy, author
Sweet & Maxwell, 2008
Buku Teks
Pinto, Arthur R., author
LexisNexis, 2009.
Buku Teks
Ferran, Eilis, author
United Kingdom Oxford University Press, 2014
Buku Teks
Cambridge University Press, 2020
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